Gabriel Diallo holds a solid grass court record of 12–9 across 21 matches (57.1%). A winning majority across 21 matches shows consistent ability to get results on grass. Claimed 1 title on grass: 's-Hertogenbosch.

At Grand Slam level (Wimbledon): Gabriel Diallo is 2–2 (50.0%) across 4 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

One final reached on grass, converted into a title — a perfect finals record on this surface. 1 semifinal. 3 quarterfinals.

By format on grass — best-of-five: 2–2 (50.0%); best-of-three: 10–7 (58.8%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on grass.

Best season: 2025 — 9–3 (75.0%) from 12 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.

Gabriel Diallo recorded a notable 5-match winning streak on grass — a run that demonstrates consistency across consecutive draws on this surface.

Recent Form 2026: 3–4 (42.9%) on grass. Last 7: L L W W L W L — mixed results, some inconsistency in the current period.