Oliver Marach has found clay courts difficult, recording 15–19 across 34 matches (44.1%). 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 (Roland Garros): Oliver Marach has yet to record a win on clay at this stage — 0–2 across 2 Grand Slam matches. Breaking through here would mark a significant step forward on this surface.

By format on clay — best-of-five: 1–3 (25.0%); best-of-three: 14–16 (46.7%). 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: 2006 — 11–9 (55.0%) from 20 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.