Trey Waltke has found clay courts difficult, recording 19–46 across 65 matches (29.2%). 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): Trey Waltke is 8–9 (47.1%) across 17 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

vs. Top 10 on clay: 0–6 (0.0%, 6 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

By format on clay — best-of-five: 4–5 (44.4%); best-of-three: 15–41 (26.8%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1976 — 7–10 (41.2%) from 17 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.