Juan Aguilera has a competitive clay court record of 136–114 across 250 matches (54.4%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. 5 titles on clay: Nice, Aix-en-Provence, Bari, Hamburg, Hamburg Masters — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Roland Garros): Juan Aguilera is 7–6 (53.8%) across 13 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): Juan Aguilera is elite here — 11–5 (68.8%) across 16 matches. Sustaining that win rate in the Tour's deepest regular-week draws is a defining quality of the very best on this surface.

9 finals reached on clay — won 5, lost 4 (solid 56% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 14 semifinals. 23 quarterfinals.

vs. Top 10 on clay: 6–13 (31.6%, 19 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: 11–7 (61.1%); best-of-three: 125–107 (53.9%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Peak season: 1989 — 19–8 (70.4%) from 27 matches. That year captures the ceiling of what Juan Aguilera can do on clay when performing at their best and represents the standard to aim for.