David Prinosil has found hard courts difficult, recording 61–93 across 154 matches (39.6%). 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): David Prinosil has struggled at Grand Slam level on hard: 8–17 (32.0%) in 25 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): David Prinosil has struggled at Masters level on hard: 1–11 (8.3%) in 12 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

4 semifinals on hard without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 13 quarterfinals adds further depth to that picture.

vs. Top 10 on hard: 4–18 (18.2%, 22 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: 8–17 (32.0%); best-of-three: 53–76 (41.1%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on hard.

Best season: 1996 — 13–11 (54.2%) from 24 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.