Russell Simpson has found clay courts difficult, recording 15–38 across 53 matches (28.3%). 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): Russell Simpson 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.

vs. Top 10 on clay: 0–6 (0.0%, 6 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: 4–9 (30.8%); best-of-three: 11–29 (27.5%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Best season: 1975 — 2–3 (40.0%) from 5 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.