Brazilian 18-year-old Joao Fonseca defeated Argentine fifth seed Francisco Cerundolo 6-4, 7-6 (1) to win his first ATP Tour title at the IEB+ Argentina Open on Sunday in Buenos Aires.

Teenager João Fonseca won his first ATP Tour title at the Argentina Open on Sunday, announcing himself as one of tennis’ brightest talents.

Joao Fonseca is making a name for himself in the season's early months! The 18-year-old Brazilian scored his first top-10 win at Majors at the Australian Open and shifted that form to Buenos Aires. A teenager defeated four rivals at the ATP 250 event for his first ATP final!

Francisco Cerundolo stunned World No. 2 Alexander Zverev 3-6, 6-3, 6-2 in the Buenos Aires quarterfinals, marking the biggest win of his career. His previous-best career win by ranking came against a No.

RIO DE JANEIRO (AP) — Teenage tennis sensation João Fonseca frustrated his home fans at the Rio Open in a first-round loss Tuesday, two days after winning his first ATP title. Fonseca lost 6-1, 7-6 (4) to No. 60-ranked Alexandre Muller of France, making 34 unforced errors and appearing to be exhausted during the match.

Brazilian 18-year-old Joao Fonseca saved two match points and pushed past Argentina's Mariano Navone 3-6, 6-4, 7-5 in the quarterfinals of the IEB+ Argentina Open on Friday in Buenos Aires. The match lasted two hours and 54 minutes and saw home favorite Navone serve for the match in the 10th game of the third set.

Rising tennis star João Fonseca has finished what he called “an unbelievable week” with a straight sets victory over Francisco Cerúndolo in the final of the Argentina Open to claim his first tour-level title.