Diego Perez has found hard courts difficult, recording 36–53 across 89 matches (40.4%). 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 (Australian Open & US Open): Diego Perez has struggled at Grand Slam level on hard: 3–7 (30.0%) in 10 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

2 semifinals on hard 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. 6 quarterfinals adds further depth to that picture.

vs. Top 10 on hard: 0–4 (0.0%, 4 matches). Top 10 opponents have represented a clear ceiling on hard; addressing that deficit is the single biggest lever for improving the overall record here.

By format on hard — best-of-five: 8–12 (40.0%); best-of-three: 28–41 (40.6%). Consistent regardless of format on hard — a sign of a well-rounded game that holds up as matches develop.

Best season: 1983 — 4–2 (66.7%) from 6 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.