João Fonseca João Fonseca may refer to: * João Fonseca (footballer) (born 1948), Portuguese football manager and former goalkeeper *João Fonseca (tennis) João Franca Guimarães Fonseca (; born 21 August 2006) is a Brazilians, Brazilian professional tenn ...

defeated

Francisco Cerúndolo Francisco Cerúndolo (; born 13 August 1998) is an Argentine professional tennis player. He has a career-high ATP singles ranking of world No. 18, achieved on 5 May 2025 and a doubles ranking of No. 203, achieved on 31 October 2022. He is curr ...

in the final, 6–4, 7–6^(7–1) to win the singles tennis title at the

2025 Argentina Open The 2025 Argentina Open (also known as the IEB+ Argentina Open for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 28th edition of the ATP Buenos Aires event, and part of the ATP Tour 250 series of the ...

. He saved two match points (in the quarterfinals against

Mariano Navone Mariano Navone (born 27 February 2001) is an Argentine professional tennis player. He has a career-high ATP singles ranking of world No. 29, achieved on 10 June 2024 and a doubles ranking of No. 141, achieved on 9 June 2025. Early life and backg ...

) en route to his first

ATP Tour The ATP Tour (known as ATP World Tour between January 2009 and December 2018) is the sole worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals (ATP) founded in 1990 that replaced the earlier dual Grand Prix ...

title. Fonseca was the youngest Brazilian man and the second-youngest South American in the

Open Era The racket sport traditionally named lawn tennis, invented in Edgbaston, Warwickshire, England, now commonly known simply as tennis, is the direct descendant of what is now denoted real tennis or royal tennis, which continues to be played today a ...

, behind only

Guillermo Pérez Roldán Guillermo Pérez Roldán (; born 20 October 1969) is a former professional tennis player from Argentina. Pérez Roldán was known particularly as a strong clay court player. He turned professional in 1986. Between 1987 and 1993, he won nine top ...

in 1987, and the first man born in 2006, to win a top-level title. He entered the tournament through the Next Gen Accelerator Program introduced by the ATP in 2024, being the first player entered under the system to win a tour-level title. Fonseca was the first Brazilian man to win the

Argentina Open The Argentina Open or Abierto Argentino is an annual ATP men's tennis event held in Buenos Aires, Argentina. The tournament is listed as an ATP 250 on the ATP Tour, and is played on outdoor clay courts at the 5,500 capacity Buenos Aires Lawn Ten ...

title since

Gustavo Kuerten Gustavo "Guga" Kuerten (; born 10 September 1976) is a Brazilian former professional tennis player. He was ranked as the list of ATP number 1 ranked singles tennis players, world No. 1 in men's singles by the Association of Tennis Professionals f ...

2001 The year's most prominent event was the September 11 attacks against the United States by al-Qaeda, which Casualties of the September 11 attacks, killed 2,977 people and instigated the global war on terror. The United States led a Participan ...

, and the lowest-ranked champion (world No. 99) in tournament history.

Facundo Díaz Acosta Facundo Díaz Acosta (born 15 December 2000) is an Argentine professional tennis player. He has a career-high ATP singles ranking of world No. 47, achieved on 22 April 2024. He also has a doubles ranking of No. 173, achieved on 28 November 2022. ...

was the defending champion, but lost in the first round to

Thiago Seyboth Wild Thiago Seyboth Wild (; born 10 March 2000) is a Brazilians, Brazilian professional tennis player. He has a career-high Association of Tennis Professionals, ATP singles ranking of world No. 58, achieved on 20 May 2024 and a doubles ranking of No. ...

. This tournament marked the final professional appearance of former world No. 8

Diego Schwartzman Diego Sebastián Schwartzman (, ; born 16 August 1992) is an Argentine former professional tennis player. He won four ATP Tour singles titles and reached his career-high singles ranking of world No. 8 in October 2020. As a clay court specialist ...

. He defeated seventh seed

Nicolás Jarry Nicolás Jarry Fillol (; born 10 October 1995) is a Chilean professional tennis player. He achieved his highest Association of Tennis Professionals, ATP singles ranking of world 16 in May 2024 and is the current No. 3 player from Chile. His hi ...

in the first round, before losing in the second round to

Pedro Martínez Pedro Jaime Martínez (born October 25, 1971) is a Dominican-American former professional baseball starting pitcher, who played in Major League Baseball (MLB) from to , for five teams—most notably the Boston Red Sox from to . As of 2023, M ...

Seeds

The top four

seeds In botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a ''testa''. More generally, the term "seed" means anything that can be sown, which may include seed and husk or tuber. Seeds are the ...

Seeds

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Lucky losers

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

References

External links