Wolfgang Popp has found clay courts difficult, recording 23–44 across 67 matches (34.3%). 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): Wolfgang Popp 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.

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. 4 quarterfinals adds further depth to that picture.

vs. Top 10 on clay: 1–6 (14.3%, 7 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

Best season: 1980 — 7–6 (53.8%) from 13 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.