Wally Masur has found clay courts difficult, recording 24–50 across 74 matches (32.4%). 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): Wally Masur has struggled at Grand Slam level on clay: 4–10 (28.6%) in 14 matches. The best-of-five format and elite fields make this the toughest benchmark 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. 3 quarterfinals adds further depth to that picture.

vs. Top 10 on clay: 0–12 (0.0%, 12 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.

By format on clay — best-of-five: 5–17 (22.7%); best-of-three: 19–33 (36.5%). 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: 1993 — 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.