Nicolas Devilder has found clay courts difficult, recording 17–27 across 44 matches (38.6%). 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): Nicolas Devilder is 3–4 (42.9%) across 7 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

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: 3–4 (42.9%); best-of-three: 14–23 (37.8%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Best season: 2007 — 8–10 (44.4%) from 18 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.