Colin Dowdeswell has found clay courts difficult, recording 62–91 across 153 matches (40.5%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Claimed 1 title on clay: Istanbul.

At Grand Slam level (Roland Garros): Colin Dowdeswell is 6–9 (40.0%) across 15 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

One final reached on clay, converted into a title — a perfect finals record on this surface. 3 semifinals. 7 quarterfinals.

vs. Top 10 on clay: 1–5 (16.7%, 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: 5–7 (41.7%); best-of-three: 57–84 (40.4%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 1983 — 9–5 (64.3%) from 14 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.