Danie Visser has found clay courts difficult, recording 4–15 across 19 matches (21.1%). 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): Danie Visser has struggled at Grand Slam level on clay: 3–5 (37.5%) in 8 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on clay — best-of-five: 3–5 (37.5%); best-of-three: 1–10 (9.1%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1982 — 1–6 (14.3%) from 7 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.