Miloslav Mecir Sr. has an impressive clay court record of 97–48 across 145 matches (66.9% — strong). A win rate of that calibre over 145 matches is a reliable indicator of genuine quality on this surface. 4 titles on clay: Stuttgart, Hamburg, Kitzbuhel, Hilversum — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Roland Garros): Miloslav Mecir Sr. is 8–6 (57.1%) across 14 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

11 finals reached on clay — won 4, lost 7 (36% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 11 semifinals. 20 quarterfinals.

vs. Top 10 on clay: 6–9 (40.0%, 15 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: 16–11 (59.3%); best-of-three: 81–37 (68.6%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Dominant season: 1987 — 31–7 (81.6%) from 38 matches. A campaign of 31 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.

Miloslav Mecir Sr. assembled a remarkable 17-match winning streak on clay — a run of that length goes far beyond form and into a different level of dominance on this surface.