Roberto Carretero has found clay courts difficult, recording 22–40 across 62 matches (35.5%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Claimed 1 title on clay: Hamburg Masters.

At Grand Slam level (Roland Garros): 1–2 across just 3 matches — still very early days at this level on clay.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): a positive 8–7 (53.3%) across 15 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on clay.

One final reached on clay, converted into a title — a perfect finals record on this surface. 1 semifinal. 2 quarterfinals.

vs. Top 10 on clay: 1–4 (20.0%, 5 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: 2–2 (50.0%); best-of-three: 20–38 (34.5%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1996 — 10–13 (43.5%) from 23 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.