Denis Gremelmayr has found hard courts difficult, recording 16–34 across 50 matches (32.0%). 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 (Australian Open & US Open): Denis Gremelmayr has struggled at Grand Slam level on hard: 3–5 (37.5%) in 8 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Denis Gremelmayr has struggled at Masters level on hard: 1–2 (33.3%) in 3 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

vs. Top 10 on hard: 0–5 (0.0%, 5 matches). Top 10 opponents have represented a clear ceiling on hard; addressing that deficit is the single biggest lever for improving the overall record here.

By format on hard — best-of-five: 3–5 (37.5%); best-of-three: 13–29 (31.0%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Best season: 2006 — 5–6 (45.5%) from 11 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.