Peter Lundgren has found clay courts difficult, recording 1–18 across 19 matches (5.3%). 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): Peter Lundgren has struggled at Grand Slam level on clay: 1–6 (14.3%) in 7 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on clay — best-of-five: 1–6 (14.3%); best-of-three: 0–12 (0.0%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1986 — 0–5 (0.0%) from 5 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.