Nicolas Massu has found grass courts difficult, recording 6–12 across 18 matches (33.3%). 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): Nicolas Massu has struggled at Grand Slam level on grass: 4–9 (30.8%) in 13 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on grass — best-of-five: 4–10 (28.6%); best-of-three: 2–2 (50.0%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on grass.