| Australian Open | 01/20 03:20 | 23 |
[32] Joao Fonseca v
Eliot Spizzirri
[85]
|
4-6,6-2,1-6,2-6 | |
| ATP Brisbane | 01/05 01:00 | 25 |
Reilly Opelka
v
Joao Fonseca
|
CANC | |
| Others | 12/09 01:30 | - |
Carlos Alcaraz Garfia
v
Joao Fonseca
|
7-5,2-6,10-8 | |
| ATP Paris | 10/29 20:20 | 25 |
[14] Karen Khachanov
v
Joao Fonseca [28]
|
6-1,3-6,6-3 | |
| ATP Paris | 10/28 12:35 | 24 |
[24] Denis Shapovalov
v
Joao Fonseca [28]
|
7-5,4-6,3-6 | |
| ATP Basel | 10/26 14:30 | 29 |
[18] Hiltzik/ Koepfer
v
Joao Fonseca [46]
|
3-6,4-6 | |
| ATP Basel | 10/25 13:00 | 28 |
[46] Joao Fonseca v
Jaume Munar
[42]
|
7-6,7-5 | |
| ATP Basel | 10/24 13:30 | 27 |
[46] Joao Fonseca v
Denis Shapovalov
[23]
|
Retired | |
| ATP Basel | 10/23 10:00 | 26 |
Jakub Mensik
v
Joao Fonseca
|
Walkover | |
| ATP Basel | 10/21 14:05 | 25 |
[33] Giovanni Mpetshi Perricard
v
Joao Fonseca [46]
|
6-7,3-6 | |
| ATP Brussels | 10/14 18:20 | 25 |
[45] Joao Fonseca v
Botic Van De Zandschulp
[86]
|
5-7,6-7 | |
| Laver Cup | 09/20 02:00 | 3 |
[25] Flavio Cobolli
v
Joao Fonseca [42]
|
4-6,3-6 |
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. 431, reached on 26 February 2024. 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, as well as the 2024 NextGen Finals.