Jan Vacek has found hard courts difficult, recording 12–33 across 45 matches (26.7%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Claimed 1 title on hard: Salvador.

At Grand Slam level (Australian Open & US Open): Jan Vacek has struggled at Grand Slam level on hard: 1–6 (14.3%) in 7 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): Jan Vacek 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.

One final reached on hard, converted into a title — a perfect finals record on this surface. 1 semifinal. 2 quarterfinals.

vs. Top 10 on hard: 0–4 (0.0%, 4 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: 1–6 (14.3%); best-of-three: 11–27 (28.9%). 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: 2001 — 7–2 (77.8%) from 9 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.

Jan Vacek recorded a notable 7-match winning streak on hard — a run that demonstrates consistency across consecutive draws on this surface.