Paul Gerken has found clay courts difficult, recording 35–45 across 80 matches (43.8%). 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 (Roland Garros): Paul Gerken is 5–5 (50.0%) across 10 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

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: 2–2 (50.0%); best-of-three: 33–43 (43.4%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Best season: 1972 — 6–4 (60.0%) from 10 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.