Roberto Vizcaino has found clay courts difficult, recording 20–30 across 50 matches (40.0%). 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): 1–2 across just 3 matches — still very early days at this level on clay.

vs. Top 10 on clay: 0–4 (0.0%, 4 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: 1–2 (33.3%); best-of-three: 19–28 (40.4%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Best season: 1983 — 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.