Jan Kroslak has a competitive hard court record of 37–42 across 79 matches (46.8%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Claimed 1 title on hard: Tel Aviv.

At Grand Slam level (Australian Open & US Open): Jan Kroslak is 9–8 (52.9%) across 17 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Jan Kroslak has struggled at Masters level on hard: 2–5 (28.6%) in 7 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. 3 semifinals. 5 quarterfinals.

vs. Top 10 on hard: 1–4 (20.0%, 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: 9–9 (50.0%); best-of-three: 28–33 (45.9%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Best season: 1995 — 7–4 (63.6%) from 11 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.