Luis Horna holds a solid clay court record of 104–85 across 189 matches (55.0%). A winning majority across 189 matches shows consistent ability to get results on clay. Claimed 2 titles on clay: Acapulco, Vina del Mar.

At Grand Slam level (Roland Garros): Luis Horna is 5–6 (45.5%) across 11 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): Luis Horna is 8–11 (42.1%) across 19 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole clay swing.

2 finals reached on clay — converted 2 into titles (outstanding 100% conversion rate). Converting finals at that rate separates champions from contenders. 10 semifinals. 20 quarterfinals.

vs. Top 10 on clay: 8–8 (50.0%, 16 matches). Competitive against the elite, but still narrowly below .500 — closing that gap would directly elevate the overall clay court profile.

By format on clay — best-of-five: 28–10 (73.7%); best-of-three: 76–75 (50.3%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1999 — 4–1 (80.0%) from 5 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.