Michael Kohlmann has found hard courts difficult, recording 7–21 across 28 matches (25.0%). 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): Michael Kohlmann is 3–4 (42.9%) across 7 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

By format on hard — best-of-five: 3–4 (42.9%); best-of-three: 4–17 (19.0%). Significantly better in five-set matches — a strong physical profile on hard that tends to tell as matches and tournaments progress.

Best season: 1998 — 3–4 (42.9%) from 7 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.