Jean-Baptiste Chanfreau has found grass courts difficult, recording 29–37 across 66 matches (43.9%). 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 (Wimbledon): Jean-Baptiste Chanfreau has struggled at Grand Slam level on grass: 5–11 (31.3%) in 16 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on grass — best-of-five: 9–16 (36.0%); best-of-three: 20–21 (48.8%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on grass.

Best season: 1973 — 6–3 (66.7%) from 9 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.