Wojtek Kowalski has a competitive clay court record of 14–13 across 27 matches (51.9%). The record shows a player capable of competing here, though there is clear room to push the win rate higher.

At Grand Slam level (Roland Garros): Wojtek Kowalski has yet to record a win on clay at this stage — 0–1 across 1 Grand Slam match. Breaking through here would mark a significant step forward on this surface.

By format on clay — best-of-five: 6–7 (46.2%); best-of-three: 8–6 (57.1%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Best season: 1988 — 3–3 (50.0%) from 6 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.

Wojtek Kowalski recorded a notable 5-match winning streak on clay — a run that demonstrates consistency across consecutive draws on this surface.