Gilbert Schaller has a competitive clay court record of 103–96 across 199 matches (51.8%). 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: Casablanca.

At Grand Slam level (Roland Garros): Gilbert Schaller has struggled at Grand Slam level on clay: 3–6 (33.3%) in 9 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): a positive 9–9 (50.0%) across 18 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on clay.

4 finals reached on clay — won 1, lost 3 (25% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 10 semifinals. 26 quarterfinals.

vs. Top 10 on clay: 7–7 (50.0%, 14 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: 6–6 (50.0%); best-of-three: 97–90 (51.9%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Dominant season: 1995 — 40–22 (64.5%) from 62 matches. A campaign of 40 wins on clay in a single season is among the best single-season records the surface has seen — the clearest benchmark of what is achievable at peak level.