Jaime Fillol Sr. holds a solid clay court record of 297–164 across 461 matches (64.4%). A winning majority across 461 matches shows consistent ability to get results on clay. 5 titles on clay: Indianapolis, Clemmons, Dusseldorf-2, Mexico City — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Roland Garros): a positive 23–14 (62.2%) across 37 matches — a player who generally rises to the occasion at the Slams on clay.

15 finals reached on clay — won 5, lost 10 (33% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 34 semifinals. 56 quarterfinals.

vs. Top 10 on clay: 8–45 (15.1%, 53 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: 38–47 (44.7%); best-of-three: 259–117 (68.9%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Best season: 1968 — 12–2 (85.7%) from 14 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.