Simone Colombo has found clay courts difficult, recording 30–37 across 67 matches (44.8%). 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: St. Vincent.

At Grand Slam level (Roland Garros): Simone Colombo has yet to record a win on clay at this stage — 0–1 across 1 Grand Slam match. Breaking through here would mark a significant step forward on this surface.

One final reached on clay, converted into a title — a perfect finals record on this surface. 3 semifinals. 6 quarterfinals.

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: 0–3 (0.0%); best-of-three: 30–34 (46.9%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Best season: 1986 — 14–7 (66.7%) from 21 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.