In this Portuguese name, the first or maternal family name is Franca and the second or paternal family name is Guimarães Fonseca.

João Fonseca
Fonseca at the 2024 Cary Tennis Classic
Full name João Franca Guimarães Fonseca[1]
Country (sports) Brazil Brazil
Residence Rio de Janeiro
Born (2006-08-21) 21 August 2006 (age 19)
Rio de Janeiro, Brazil
Height 1.88 m (6 ft 2 in)
Turned pro 2024
Plays Right-handed (two-handed backhand)
Coach
  • Franco Davin[2]
  • Guilherme Teixeira
Prize money US $2,826,835[3]
Singles
Career record 42–28 (at ATP Tour level, Grand Slam level, and in Davis Cup)
Career titles 2
Highest ranking No. 24 (3 November 2025)
Current ranking No. 35 (2 March 2026)
Grand Slam singles results
Australian Open 2R (2025)
French Open 3R (2025)
Wimbledon 3R (2025)
US Open 2R (2025)
Doubles
Career record 4–5 (at ATP Tour level, Grand Slam level, and in Davis Cup)
Career titles 1
Highest ranking No. 160 (23 February 2026)
Current ranking No. 163 (2 March 2026)
Team competitions
Davis Cup 4–2
Last updated on: 11 March 2026.

João Franca Guimarães Fonseca ( Portuguese pronunciation: [ʒuˈɐ̃w fõˈsekɐ]; born 21 August 2006) is a Brazilian professional tennis player. He has a career-high ATP singles ranking of world No. 24, achieved on 3 November 2025 and a best doubles ranking of No. 160, reached on 23 February 2026. He is the current No. 1 singles player from Brazil.

Fonseca has won two ATP Tour singles titles at the 2025 Argentina Open and 2025 Swiss Indoors and one doubles title, at the 2026 Rio Open.

Fonseca is also the 2024 NextGen Finals champion.

Early life

Fonseca was born in Ipanema, Rio de Janeiro, to parents Roberta and Christiano Fonseca.[4][5] He started taking tennis lessons in his early childhood, at the Rio de Janeiro Country Club, a multi-sports club next to his home.[5] Soon, he took part in kids' competitions and eventually in junior tournaments.

Junior career

Fonseca had remarkable results on ITF Junior Circuit, maintaining a 92–27 singles win-loss record.[citation needed] He reached the final of the boys' doubles category at the 2023 Australian Open Jr. with Belgian Alexander Blockx.[6] In March, he was a runner-up at Banana Bowl, a top junior-level event hosted in Criciúma. The Brazilian lost to Russian Yaroslav Demin in the final.[7]

In July, Fonseca won the prestigious U18 grass tournament in Roehampton[8], England, prior to a run at the 2023 Wimbledon that saw him reach the quarterfinals in singles. He lost to eventual champion Henry Searle.[9] He reached the semifinals in the doubles category, with Bolivian Juan Carlos Prado Ángelo. [10]

Later that season, he won the boys' singles title at the 2023 US Open with a victory over American Learner Tien in the final.[11][12][13] With that result, he became the third major jr. champion in singles from Brazil, after Tiago Fernandes and Thiago Seyboth Wild.

Fonseca was named the 2023 world junior champion by the ITF. At 17 years old, he was the first Brazilian [14] to finish the season as world No. 1 in the junior rankings.[15][16]

Professional career

2023: First professional matches, ATP Tour debut

Fonseca made his ATP debut at the 2023 Rio Open after receiving a wildcard for the singles main draw[17] and also appeared in the doubles main draw, entering as lucky losers with Mateus Alves.

2024: First ATP wins, NextGen Finals title

In January 2024, the 17-year-old Fonseca reached the semifinals of the Buenos Aires Challenger, his best performance in this type of tournament. Until then, Fonseca had reached the quarterfinals in two challengers, the first in 2022 in São Leopoldo and the most recent in 2023, in Florianópolis.[18]

Ranked No. 655 that moment, he made a second appearance in the main draw at the 2024 Rio Open after receiving a wildcard in singles and also in doubles qualifying with Marcelo Zormann.[19] He recorded his first ATP and first ATP 500 win over seventh seed Arthur Fils in straight sets, giving away only four games.[20] Excluding the Davis Cup, he became the first South American to claim an opening set 6–0 against a top 50 ranked opponent before turning 18, since the ATP rankings were first published in 1973.[21] He also became the first player born in 2006 to win an ATP Tour match.[22][23][24] Next, he defeated Cristian Garin in straight sets to reach his first ATP quarterfinal. As a result, he moved 300 positions up, making him the youngest player in the top 350 in the rankings. He became the second youngest ATP 500 quarterfinalist since the series began in 2009 and the first since Alexander Zverev made the last eight in Hamburg in 2014.[25]

Days after the end of his run in Rio, Fonseca was rewarded with a second consecutive ATP Tour tournament wildcard at the 2024 Chile Open.[26] Later that week, he officially announced his decision to fully turn pro, forgoing his eligibility to play college tennis and ending his commitment to the University of Virginia.[27]

In March, at the 2024 Paraguay Open, Fonseca defeated Argentine Román Burruchaga to reach his first ATP Challenger final and made his top 300 debut at world No. 288 on 1 April 2024 moving more than 50 positions up in the rankings.[28] He lost to compatriot Gustavo Heide in the championship match.[29][30]

Ranked No. 276, he received a wildcard for the 2024 Țiriac Open in Bucharest, Romania and reached the quarterfinals of an ATP Tour event for the second time, defeating sixth seed Lorenzo Sonego, his third ATP tour win,[31] and fellow qualifier Radu Albot.[32] He lost to fourth seed Alejandro Tabilo.[33] As a result, he reached the top 250 in the rankings.[34]

Fonseca received a wildcard for the main draw of the 2024 Madrid Open, making his debut at a Masters 1000 and defeated American Alex Michelsen,[35] recording his first win at this level.[36][37] Ranked No. 217, at the beginning of the grass season, he also received a wildcard for the main draw of the 2024 Halle Open.[38] He reached the top 175 at world No. 166 on 5 August 2024, climbing close to 50 positions up, following lifting his maiden Challenger title at the 2024 Lexington Challenger, without losing a single set in the tournament.[39] At 17 years old, he was the youngest Challenger champion of the 2024 season.[40][41][42]

Fonseca qualified for the 2024 Next Generation ATP Finals on 29 November 2024.[43][44] Although the lowest ranked player, he won the title.[45][46]

2025: Major debut & third round, ATP 500 title, Brazilian No. 1, top 25

Fonseca lifted his second Challenger title at his very first tournament of the season, the 2025 Canberra Tennis International, defeating American Ethan Quinn in the final,[47] recording his 10th consecutive win and reaching his new career high ranking at No. 113 on 6 January 2025.[48]

Fonseca playing at the 2025 Canberra Tennis International.

Fonseca qualified for the Australian Open to make his major debut.[49][50] He defeated ninth seed Andrey Rublev in straight sets in his first major main draw match for his first top 10 victory,[51][52] becoming the first teenager since Mario Ančić (against Roger Federer in 2002 Wimbledon Championships) to beat a top 10 player in the first round of a Grand Slam.[53] Fonseca made his Top 100 debut on 27 January 2025, at No. 99. At 18 years 5 months and 6 days, he became the youngest Brazilian to ever do so, surpassing Cássio Motta.[54][55]

Fonseca became the youngest Brazilian in the Open Era to reach an ATP semifinal, at the 2025 Argentina Open and the first man born in 2006 or later to reach a final.[56] At 18 years 5 months and 26 days, Fonseca became also the tenth-youngest tour-level finalist since 2000, and the youngest South American finalist since former World No. 20 Argentine José Acasuso in 2001. With reaching the final he entered the top 75 in the rankings, becoming the Brazilian No. 1 singles player on 17 February 2025.[57][58] He lifted his maiden tour-level title with a straight-sets win over Francisco Cerúndolo becoming the youngest Brazilian to win an ATP title in the Open Era.[59] He was also the youngest South American champion and 10th-youngest titlist in ATP Tour era (since 1990).[60]

Fonseca celebrating his win in the 2025 Buenos Aires final

After that campaign, Fonseca came back to his hometown event at the 2025 Rio Open, where he played in the singles draw and lost to Alexandre Müller in the first round.[61][62]

Fonseca received a wildcard to the Indian Wells Open, a prestigious Masters 1000-level event. The Brazilian won against Jacob Fearnley in three sets[63] and lost in the second round to the 13th seed and eventual champion Jack Draper.[64][65]

This early defeat led Fonseca to play the following week in the Arizona Tennis Classic in Phoenix,[66] where he earned his second Challenger singles title – biggest of the series at 175 – for the season, with victories over fourth seed Jan-Lennard Struff[citation needed], former Top-10 Kei Nishikori[67] and Alexander Bublik in the final.[68] It was also his fourth Challenger title overall. With this trophy, Fonseca became the first player to win ATP 250, Challenger 175 and Challenger 125 titles in the same season.[69]

At the 2025 Wimbledon Championships, on his debut at the tournament, Fonseca became the first Brazilian man to reach the third round since Thomaz Bellucci in 2010, and the youngest man to reach the third round since Bernard Tomic in 2011.[70] As a result he reached the top 50 on 14 July 2025.[71]

After reaching the third round of the Cincinnati Masters 1000, he reached No. 44 in the world, joining Flávio Saretta as one of the top 10 Brazilian men's tennis players in history.[72] He also reached the second round of the US Open, where he was eliminated by No. 22 Tomáš Macháč, and rose to No. 42 in the rankings.[73]

João Fonseca has won Swiss Indoors Basel 2025.

At the 2025 Swiss Indoors in Basel, he defeated defending champion Giovanni Mpetshi Perricard in the first round. After a walkover from Jakub Menšík, Fonseca then defeated world No. 23 and ninth seed Denis Shapovalov in the quarterfinals and world No. 42 Jaume Munar in the semifinals. Fonseca was crowned champion after his victory over No. 18 and eighth seed Alejandro Davidovich Fokina in the final. As a result of that title, Fonseca became the first Brazilian singles player to win an ATP 500 tournament since the tournament's designation was created in 2009 and also the second youngest player to lift a title at this level after Carlos Alcaraz. That new title boosted his singles ranking to a career-high of world No. 28 on 27 October 2025. It was the biggest title of Fonseca's career to date, and the most notable achievement in Brazilian tennis in men's singles since Kuerten's title at the 2001 Cincinnati Masters.[74][75][76]

2026: First ATP doubles final and title

In January 2026, Fonseca was scheduled to start the season by playing at the Brisbane International and face Reilly Opelka on the first round, but due to an injury on his back, he withdrew of that tournament.[77] He would also play at the Adelaide International the following week, but still feeling that injury, he also decided not to play.[78]

Later that month, he participated at the Australian Open as the 28th seed, but lost on the first round to Eliot Spizzirri in four sets.[79][80]

Fonseca's next tournament of the season was at the Argentina Open in Buenos Aires, where he was the defending singles champion, but could not defend his title due to a loss on the first round to Alejandro Tabilo in three sets.[81][82]

His next tournament was at the Rio Open, his hometown event, where Fonseca got his first win of the season by beating fellow countryman and qualifier Thiago Monteiro.[83] He lost on the second round to Peruvian Ignacio Buse in three sets.[84][85] Fonseca also received a wildcard to participate in the doubles event, partnering with compatriot Marcelo Melo.[86][87] The Brazilian pair reached the final, facing German Constantin Frantzen and Dutch Robin Haase. That was the first time on Fonseca's career that he reached a doubles final on any ATP tournament.[88] Fonseca and Melo ended up winning that final, securing his first ever doubles title on the ATP Tour.[89][90] As a result, Fonseca also achieved his best doubles ranking at that moment, No. 160.[91]

Fonseca arrived at the Indian Wells Open unseeded.[92] Despite this disadvantage, he collected victories against 16th seed Karen Khachanov[93] and 23rd seed Tommy Paul[94] to reach the Round of 16[95], where he lost to world No. 2 Jannik Sinner in two tie-breaks.[96][97]

Personal life

Fonseca's father is CEO and co-founder of IP Capital Partners, the first independent hedge fund in Brazil.[98] His mother is a former volleyball player.

Performance timelines

Key
W  F  SF QF #R RR Q# P# DNQ A Z# PO G S B NMS NTI P NH
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.

Singles

Current through the 2026 BNP Paribas Open.

Tournament 2023 2024 2025 2026 SR W–L Win%
Grand Slam tournaments
Australian Open A A 2R 1R 0 / 2 1–2 33%
French Open A A 3R 0 / 1 2–1 67%
Wimbledon A Q1 3R 0 / 1 2–1 67%
US Open A Q3 2R 0 / 1 1–1 50%
Win–loss 0–0 0–0 6–4 0–1 0 / 5 6–5 55%
National representation
Davis Cup A RR WG1 0 / 2 4–2 67%
ATP 1000 tournaments
Indian Wells Open A A 2R 4R 0 / 2 4–2 67%
Miami Open A A 3R 0 / 1 2–1 67%
Monte-Carlo Masters A A A 0 / 0 0–0  – 
Madrid Open A 2R 2R 0 / 2 2–2 50%
Italian Open A A 1R 0 / 1 0–1 0%
Canadian Open A A 1R 0 / 1 0–1 0%
Cincinnati Open A A 3R 0 / 1 2–1 67%
Shanghai Masters A A A 0 / 0 0–0  – 
Paris Masters A A 2R 0 / 1 1–1 50%
Win–loss 0–0 1–1 7–7 3–1 0 / 9 11–9 55%
Career statistics
2023 2024 2025 2026 Career
Tournaments 1 6 17 4 28
Titles 0 0 2 0 2
Finals 0 0 2 0 2
Overall win–loss 0–1 12–7 26–16 4–4 42–28
Win % 0% 63% 62% 50% 60%
Year-end ranking 730 145 24 $2,704,345

ATP Tour finals

Singles: 2 (2 titles)

Legend
Grand Slam (–)
ATP 1000 (–)
ATP 500 (1–0)
ATP 250 (1–0)
Finals by surface
Hard (1–0)
Clay (1–0)
Grass (–)
Finals by setting
Outdoor (1–0)
Indoor (1–0)
Result W–L    Date    Tournament Tier Surface Opponent Score
Win 1–0 Feb 2025 Argentina Open, Argentina ATP 250 Clay Argentina Francisco Cerúndolo 6–4, 7–6(7–1)
Win 2–0 Oct 2025 Swiss Indoors, Switzerland ATP 500 Hard (i) Spain Alejandro Davidovich Fokina 6–3, 6–4

Doubles: 1 (title)

Legend
Grand Slam (–)
ATP 1000 (–)
ATP 500 (1–0)
ATP 250 (–)
Finals by surface
Hard (–)
Clay (1–0)
Grass (–)
Finals by setting
Outdoor (1–0)
Indoor (–)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Win 1–0 Feb 2026 Rio Open, Brazil ATP 500 Clay Brazil Marcelo Melo Germany Constantin Frantzen
Netherlands Robin Haase		 4–6, 6–3, [10–8]

National and international representation

Laver Cup

Laver Cup matches: 1 (1 victory)

Matches by type
Singles (1–0)
Doubles (–)
Matches by points scoring
Day 1, 1 point (1–0)
Day 2, 2 points (–)
Day 3, 3 points (–)
Matches by venue
Europe (–)
Rest of the World (1–0)
  • Increase Decrease indicates the result of the Laver Cup match followed by the score, date, place of event and the court surface.
No. Day (points) Match type (partner if any) Opponent team Opponent player(s) Result Score
6–9; 19–21 September 2025; Chase Center, San Francisco, United States; hard indoor surface
1 Day 1 (1 point) Singles Team Europe Italy Flavio Cobolli Win 6–4, 6–3[99]

Results: 1 (title)[100]

Result    Date    Location Surface Team Captains Partners Opponent team Opp. captains Opponents Score
Win Sep 2025 San Francisco, US Hard (i) Team World Andre Agassi
Pat Rafter		 Taylor Fritz
Alex de Minaur
Alex Michelsen
Francisco Cerúndolo
Reilly Opelka		 Team Europe Yannick Noah
Tim Henman		 Carlos Alcaraz
Alexander Zverev
Holger Rune
Casper Ruud
Flavio Cobolli
Jakub Menšík		 15–9[101]

ATP Next Generation finals

Singles: 1 (title)

Result    Date    Tournament Surface Opponent Score
Win Dec 2024 Next Generation ATP Finals, Saudi Arabia Hard (i) United States Learner Tien 2–4, 4–3(10–8), 4–0, 4–2

ATP Challenger Tour finals

Singles: 4 (3 titles, 1 runner-up)

Legend
ATP Challenger Tour (3–1)
Finals by surface
Hard (3–0)
Clay (0–1)
Result W–L    Date    Tournament Tier Surface Opponent Score
Loss 0–1 Mar 2024 Paraguay Open, Paraguay Challenger Clay Brazil Gustavo Heide 5–7, 7–6(8–6), 1–6
Win 1–1 Jul 2024 Lexington Challenger, US Challenger Hard Australia Li Tu 6–1, 6–4
Win 2–1 Jan 2025 Canberra Tennis International, Australia Challenger Hard United States Ethan Quinn 6–4, 6–4
Win 3–1 Mar 2025 Arizona Tennis Classic, US Challenger Hard Kazakhstan Alexander Bublik 7–6(7–5), 7–6(7–0)

Doubles: 1 (title)

Legend
ATP Challenger Tour (1–0)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Win 1–0 Jan 2024 Challenger ATT II, Argentina Challenger Clay Brazil Pedro Sakamoto Germany Jakob Schnaitter
Germany Mark Wallner		 6–2, 6–2

ITF World Tennis Tour finals

Doubles: 1 (runner-up)

Legend
ITF WTT (0–1)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Loss 0–1 Jun 2023 M15 Saarlouis, Germany WTT Clay Switzerland Dylan Dietrich Switzerland Luca Staeheli
France Robin Catry		 1–6, 2–6

Wins over top 10 players

  • Fonseca has a 1–3 record against players who were, at the time the match was played, ranked in the top 10.[102]
Season 2025 Total
Wins 1 1
# Player Rk Event Surface Rd Score Rk Ref
2025
1. Andrey Rublev 9 Australian Open, Australia Hard 1R 7–6(7–1), 6–3, 7–6(7–5) 112 [103]
  • Key: (Rk) first use, opponent rank; (Rd) round; (Rk) 2nd use, player rank; (Ref) reference; (F) final; (SF) semifinal; (QF) quarterfinal; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage

Exhibition matches

Singles

Result    Date    Tournament Surface Opponent Score
Win Jun 2024 Giorgio Armani Tennis Classic, London, UK Grass Australia Alexei Popyrin 7–6(13–11), 6–3
Loss Dec 2025 Miami Invitational, Miami, US Hard (i) Spain Carlos Alcaraz 5–7, 6–2, [8–10][104]
Win Mar 2026 The MGM Slam, Las Vegas, US Hard (i) France Gaël Monfils 10–6*
Win Kazakhstan Alexander Bublik 10–3*
Win United States Reilly Opelka [10–6, 7–10, 10–5]* [105]

* non-standard tennis sets

Doubles

Result    Date    Tournament Surface Partner Opponents Score
Win Aug 2025 Stars of the Open, US Open Fan Week, New York, US Hard Argentina Juan Martín del Potro United States Andy Roddick
United States Alex Michelsen		 11–9*

Mixed doubles

Result    Date    Tournament Surface Partner Opponents Score
Loss Dec 2025 Miami Invitational, Miami, US Hard (i) United States Amanda Anisimova Spain Carlos Alcaraz
United States Jessica Pegula		 8–10*

Junior Grand Slam finals

Singles: 1 (title)

Result Year Tournament Surface Opponent Score
Win 2023 US Open Hard United States Learner Tien 4–6, 6–4, 6–3

Doubles: 1 (runner-up)

Result Year Tournament Surface Partner Opponents Score
Loss 2023 Australian Open Hard Belgium Alexander Blockx United States Learner Tien
United States Cooper Williams		 4–6, 4–6

Awards

2023
  • ITF Junior World Champion
2025
  • Troféu ACEESP - Esportista Masculino do Ano[106]
  • Prêmio Brasil Olímpico - Atleta Masculino da Torcida (Fan's Choice)[107]

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  74. ^ João Fonseca vira o nono melhor brasileiro na história do ranking mundial masculino; veja lista
  75. ^ João Fonseca perde para número 22 do mundo e dá adeus ao US Open na segunda rodada
  76. ^ João Fonseca é oficializado como 24º do mundo e alcança melhor ranking da carreira
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