Philipp Petzschner has found clay courts difficult, recording 16–27 across 43 matches (37.2%). 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): Philipp Petzschner has struggled at Grand Slam level on clay: 2–5 (28.6%) in 7 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 3–3 (50.0%) across 6 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on clay.

2 semifinals on clay without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come.

By format on clay — best-of-five: 2–7 (22.2%); best-of-three: 14–20 (41.2%). 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: 2011 — 6–4 (60.0%) from 10 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.