Tennis-Fonseca's meteoric rise continues with first US Open win

Aug 25, 2025; Flushing, NY, USA; Joao Fonseca of Brazil in action against Miomir Kecmanovic of Serbia in the first round of the men’s singles at the US Open at Billie Jean King National Tennis Centre. Mandatory Credit: Mike Frey-Imagn Images

NEW YORK (Reuters) -Teenage sensation Joao Fonseca notched his first U.S. Open main-draw win on Monday, defeating Serbia's Miomir Kecmanovic in the opening round to extend a dream season marked by breakthrough performances at every major.

The 19-year-old Brazilian, who has won his opening match at each of his Grand Slam debuts this year, thrilled the Grandstand crowd at Flushing Meadows and powered to a 7-6(3) 7-6(5) 6-3 win despite bouts of vomiting and dizziness.