Gilles Moretton has found clay courts difficult, recording 34–50 across 84 matches (40.5%). 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): Gilles Moretton is 6–6 (50.0%) across 12 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: 0–4 (0.0%, 4 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: 6–9 (40.0%); best-of-three: 28–41 (40.6%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 1981 — 9–9 (50.0%) from 18 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.