William Brown has found grass courts difficult, recording 7–21 across 28 matches (25.0%). 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): William Brown has struggled at Grand Slam level on grass: 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 grass — best-of-five: 5–12 (29.4%); best-of-three: 2–9 (18.2%). Significantly better in five-set matches — a strong physical profile on grass that tends to tell as matches and tournaments progress.

Best season: 1974 — 3–4 (42.9%) from 7 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.