George Bastl has found grass courts difficult, recording 3–13 across 16 matches (18.8%). 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): George Bastl is 2–3 (40.0%) across 5 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

By format on grass — best-of-five: 2–3 (40.0%); best-of-three: 1–10 (9.1%). Significantly better in five-set matches — a strong physical profile on grass that tends to tell as matches and tournaments progress.