Horacio Zeballos has a competitive clay court record of 58–70 across 128 matches (45.3%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Claimed 1 title on clay: Vina del Mar.

At Grand Slam level (Roland Garros): Horacio Zeballos 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): Horacio Zeballos has struggled at Masters level on clay: 0–5 (0.0%) in 5 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

2 finals reached on clay — won 1, lost 1 (solid 50% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 4 semifinals. 10 quarterfinals.

vs. Top 10 on clay: 1–7 (12.5%, 8 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: 7–6 (53.8%); best-of-three: 51–64 (44.3%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Peak season: 2017 — 15–12 (55.6%) from 27 matches. That year captures the ceiling of what Horacio Zeballos can do on clay when performing at their best and represents the standard to aim for.