Daniel Altmaier has found grass courts difficult, recording 10–16 across 26 matches (38.5%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar.

At Grand Slam level (Wimbledon): Daniel Altmaier has struggled at Grand Slam level on grass: 1–5 (16.7%) in 6 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on grass — best-of-five: 1–5 (16.7%); best-of-three: 9–11 (45.0%). 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: 2026 — 4–4 (50.0%) from 8 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.

Recent Form 2026: 4–4 (50.0%) on grass. Last 8: L W W W L W L L — mixed results, some inconsistency in the current period.