Jean-Baptiste Chanfreau has found clay courts difficult, recording 16–52 across 68 matches (23.5%). 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): Jean-Baptiste Chanfreau has struggled at Grand Slam level on clay: 4–7 (36.4%) in 11 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on clay — best-of-five: 3–10 (23.1%); best-of-three: 13–42 (23.6%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 1971 — 4–7 (36.4%) from 11 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.