- Nome: Joao Fonseca
- Data e luogo di nascita: 21 agosto 2006, Rio de Janeiro (Brasile)
- Nazionalità: Brasile
- Sport: tennis
- Mano dritto: destro.
Rovescio bimane - Altezza: 1,88m
- Peso: 81 kg
- Superficie preferita: cemento/terra rossa
- Slam vinti: -
Partite giocate stagione in corso
| Data | Torneo | Turno | Avversario | V/P | Score |
|---|---|---|---|---|---|
| 20/01 | Australian Open | 1T | Eliot Spizzirri (USA) | S | 4-6 6-2 1-6 2-6 |
| 11/02 | IEB+ Argentina Open | OT | Alejandro Tabilo (CHL) | S | 3-6 6-3 5-7 |
| 17/02 | Rio Open presented by Claro | 16mi | Thiago Monteiro (BRA) | V | 7-6(1) 6-1 |
| 20/02 | Rio Open presented by Claro | OT | Ignacio Buse (PER) | S | 7-5 3-6 4-6 |
| 05/03 | BNP Paribas Open | 1T | Raphael Collignon (BEL) | V | 7-6(2) 6-4 |
| 07/03 | BNP Paribas Open | 32mi | Karen Khachanov (RUS) | V | 4-6 7-6(7) 6-4 |
| 09/03 | BNP Paribas Open | 16mi | Tommy Paul (USA) | V | 6-2 6-3 |
| 11/03 | BNP Paribas Open | OT | Jannik Sinner (ITA) | S | 6-7(6) 6-7(4) |
| 19/03 | Miami Open presented by Itau | 1T | Fabian Marozsan (HUN) | V | 6-4 3-6 6-2 |
| 21/03 | Miami Open presented by Itau | 32mi | Carlos Alcaraz (ESP) | S | 4-6 4-6 |
| 06/04 | Rolex Monte-Carlo Masters | 32mi | Gabriel Diallo (CAN) | V | 6-2 6-3 |
| 08/04 | Rolex Monte-Carlo Masters | 16mi | Arthur Rinderknech (FRA) | V | 7-5 4-6 6-3 |
| 09/04 | Rolex Monte-Carlo Masters | OT | Matteo Berrettini (ITA) | V | 6-3 6-2 |
| 10/04 | Rolex Monte-Carlo Masters | QF | Alexander Zverev (DEU) | S | 5-7 7-6(3) 3-6 |
| 14/04 | BMW Open by Bitpanda | 16mi | Alejandro Tabilo (CHL) | V | 7-6(1) 6-3 |
| 15/04 | BMW Open by Bitpanda | OT | Arthur Rinderknech (FRA) | V | 6-3 6-2 |
| 17/04 | BMW Open by Bitpanda | QF | Ben Shelton (USA) | S | 3-6 6-3 3-6 |
| 24/04 | Mutua Madrid Open | 32mi | Marin Cilic (HRV) | V | |
| 26/04 | Mutua Madrid Open | 16mi | Rafael Jodar (ESP) | S | 6-7(4) 6-4 1-6 |
| 09/05 | Internazionali BNL d'Italia | 32mi | Hamad Medjedovic (SRB) | S | 6-3 3-6 6-7(1) |
| 24/05 | Roland Garros | 1T | Luka Pavlovic (FRA) | V | 7-6(6) 6-4 6-2 |
| 27/05 | Roland Garros | 32mi | Dino Prizmic (HRV) | V | 3-6 4-6 6-3 6-1 6-2 |
| 29/05 | Roland Garros | 16mi | Novak Djokovic (SRB) | V | 4-6 4-6 6-3 7-5 7-5 |
| 31/05 | Roland Garros | OT | Casper Ruud (NOR) | V | 7-5 7-6(8) 5-7 6-2 |
| 02/06 | Roland Garros | QF | Jakub Mensik (CZE) | S | 4-6 3-6 6-7(3) |
| 16/06 | Terra Wortmann Open | 16mi | Yannick Hanfmann (DEU) | S | 2-6 2-6 |
| 29/06 | Wimbledon | 1T | Roberto Bautista Agut (ESP) | V | 7-6(4) 6-4 6-3 |
| 01/07 | Wimbledon | 32mi | Jesper de Jong (NLD) | V | 6-1 7-5 6-4 |
| 03/07 | Wimbledon | 16mi | Roman Safiullin (RUS) | S | 3-6 3-6 3-6 |
| 05/08 | National Bank Open presented by Rogers | 32mi | Stefanos Tsitsipas (GRC) | V | 7-6(3) 7-5 |
| 07/08 | National Bank Open presented by Rogers | 16mi | Casper Ruud (NOR) | V | 7-6(6) 6-3 |
| 09/08 | National Bank Open presented by Rogers | OT | Ben Shelton (USA) | S | 3-6 6-7(3) |
