Norman Holmes has found clay courts difficult, recording 19–40 across 59 matches (32.2%). 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): Norman Holmes has struggled at Grand Slam level on clay: 1–4 (20.0%) in 5 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

4 quarterfinals on clay, including one run to the semifinal — regularly reaching that stage is a solid baseline, with the next step being to break through to the final rounds more often.

vs. Top 10 on clay: 0–9 (0.0%, 9 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.

Best season: 1975 — 12–17 (41.4%) from 29 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.