Richard Lewis has found clay courts difficult, recording 16–39 across 55 matches (29.1%). 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): Richard Lewis has yet to record a win on clay at this stage — 0–4 across 4 Grand Slam matches. Breaking through here would mark a significant step forward on this surface.

vs. Top 10 on clay: 0–3 (0.0%, 3 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: 3–6 (33.3%); best-of-three: 13–33 (28.3%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Best season: 1977 — 11–18 (37.9%) from 29 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.