Jim McManus has found clay courts difficult, recording 30–70 across 100 matches (30.0%). 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 (Roland Garros): Jim McManus has struggled at Grand Slam level on clay: 2–7 (22.2%) in 9 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

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

By format on clay — best-of-five: 2–7 (22.2%); best-of-three: 28–63 (30.8%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Best season: 1968 — 4–3 (57.1%) from 7 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.