Trey Waltke has found grass courts difficult, recording 4–9 across 13 matches (30.8%). 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): Trey Waltke has struggled at Grand Slam level on grass: 2–5 (28.6%) in 7 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

vs. Top 10 on grass: 0–3 (0.0%, 3 matches). Top 10 opponents have represented a clear ceiling on grass; addressing that deficit is the single biggest lever for improving the overall record here.

By format on grass — best-of-five: 2–5 (28.6%); best-of-three: 2–4 (33.3%). Slightly stronger in three-set contests on grass, though the five-set record is still respectable.