Oscar Hernandez has found clay courts difficult, recording 59–84 across 143 matches (41.3%). 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): Oscar Hernandez is 5–7 (41.7%) across 12 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Oscar Hernandez is 5–6 (45.5%) across 11 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole clay swing.

3 semifinals on clay without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 14 quarterfinals adds further depth to that picture.

vs. Top 10 on clay: 0–6 (0.0%, 6 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: 5–7 (41.7%); best-of-three: 54–77 (41.2%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Peak season: 2008 — 15–12 (55.6%) from 27 matches. That year captures the ceiling of what Oscar Hernandez can do on clay when performing at their best and represents the standard to aim for.