Mark Koevermans has a competitive clay court record of 46–46 across 92 matches (50.0%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Claimed 1 title on clay: Athens.

At Grand Slam level (Roland Garros): Mark Koevermans has struggled at Grand Slam level on clay: 1–5 (16.7%) in 6 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): a positive 7–5 (58.3%) across 12 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on clay.

One final reached on clay, converted into a title — a perfect finals record on this surface. 2 semifinals. 10 quarterfinals.

vs. Top 10 on clay: 2–3 (40.0%, 5 matches). Competitive against the elite, but still narrowly below .500 — closing that gap would directly elevate the overall clay court profile.

By format on clay — best-of-five: 6–7 (46.2%); best-of-three: 40–39 (50.6%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Peak season: 1990 — 15–9 (62.5%) from 24 matches. That year captures the ceiling of what Mark Koevermans can do on clay when performing at their best and represents the standard to aim for.