Jonathan Canter has found clay courts difficult, recording 3–11 across 14 matches (21.4%). 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): Jonathan Canter is 2–2 (50.0%) across 4 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

By format on clay — best-of-five: 2–2 (50.0%); best-of-three: 1–9 (10.0%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.