Ion Tiriac holds a solid clay court record of 166–91 across 257 matches (64.6%). A winning majority across 257 matches shows consistent ability to get results on clay. 5 titles on clay: Lugano, Parioli, Palermo, Munich, Madrid — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Roland Garros): a positive 9–6 (60.0%) across 15 matches — a player who generally rises to the occasion at the Slams on clay.

9 finals reached on clay — won 5, lost 4 (solid 56% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 17 semifinals. 33 quarterfinals.

vs. Top 10 on clay: 0–5 (0.0%, 5 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: 77–35 (68.8%); best-of-three: 89–56 (61.4%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Dominant season: 1968 — 44–7 (86.3%) from 51 matches. A campaign of 44 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.