Head to head
1
Grass
1
Gabriel Diallo's wins on the left · Billy Harris's on the right · bar lengths share one scale
All meetings (2)
| 2025 | Queen's Club | Grass | R32 | Gabriel Diallo | 6-1 3-6 6-4 |
| 2024 | Newport | Grass | R32 | Billy Harris | 7-6(4) 7-5 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.