Oscar Martinez has found clay courts difficult, recording 19–25 across 44 matches (43.2%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Oscar Martinez has reached 1 final without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): Oscar Martinez has yet to record a win on clay at this stage — 0–1 across 1 Grand Slam match. Breaking through here would mark a significant step forward on this surface.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Oscar Martinez has struggled at Masters level on clay: 0–3 (0.0%) in 3 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

One final reached on clay, without converting it into a title. That final-round experience is valuable groundwork for going one step further next time. 1 semifinal. 4 quarterfinals.

vs. Top 10 on clay: 0–5 (0.0%, 5 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: 1994 — 11–8 (57.9%) from 19 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.