About João Fonseca

João Franca Guimarães Fonseca (born 21 August 2006) is a Brazilian professional tennis player. He has a career-high ATP singles ranking of world No. 42, achieved on 8 September 2025 and a doubles ranking of No. 431, achieved on 26 February 2024. He is the current No. 1 singles player from Brazil.

Fonseca has won one ATP Tour singles title at the 2025 Argentina Open, as well as the 2024 NextGen Finals.