G. Onclin leads the head-to-head 3-0 since 2018 against L. Giustino, over 3 matches.
| Surface | L. Giustino | G. Onclin |
|---|---|---|
| Grass | 0 | 1 |
| Clay | 0 | 1 |
| Hard | 0 | 1 |
| Date | Winner | Score | Event |
|---|---|---|---|
| June 22, 2026 | G. Onclin | 2 - 0 | Wimbledon · Quarter-finals · grass |
| July 14, 2025 | G. Onclin | 2 - 0 | Bunschoten · 1/16-finals · clay |
| Dec. 1, 2024 | G. Onclin | 2 - 1 | ITF M25 Monastir 4 Men · Final · hard |