J. De Jong and J. Fonseca are level 1-1 in their head-to-head since 2018 over 2 matches.
| Surface | J. De Jong | J. Fonseca |
|---|---|---|
| Grass | 0 | 1 |
| Clay | 1 | 0 |
| Date | Winner | Score | Event |
|---|---|---|---|
| July 1, 2026 | J. Fonseca | 3 - 0 | Wimbledon · 1/32-finals · grass |
| April 30, 2025 | J. De Jong | 2 - 0 | Estoril · 1/16-finals · clay |