Juan Aguilera has found hard courts difficult, recording 5–14 across 19 matches (26.3%). 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 (Australian Open & US Open): 1–2 across just 3 matches — still very early days at this level on hard.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Juan Aguilera has struggled at Masters level on hard: 1–4 (20.0%) in 5 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

By format on hard — best-of-five: 1–2 (33.3%); best-of-three: 4–12 (25.0%). Significantly better in five-set matches — a strong physical profile on hard that tends to tell as matches and tournaments progress.

Best season: 1984 — 2–3 (40.0%) from 5 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.