Ilie Nastase has been dominant on clay, posting 429–114 across 543 matches (79.0% — exceptional). Few players in the Open Era have sustained that level of dominance across a full career on clay. With 31 titles, among the most prolific clay court champions in the Open Era: Barranquilla, Rome, Nice, Monte-Carlo and 18 more.

At Grand Slam level (Roland Garros): Ilie Nastase has been outstanding — 42–16 (72.4%) across 58 matches. Winning more than 7 in 10 Grand Slam matches on clay is the benchmark of an all-time great on this surface.

49 finals reached on clay — won 31, lost 18 (solid 63% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 65 semifinals. 86 quarterfinals.

vs. Top 10 on clay: 10–22 (31.3%, 32 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: 169–48 (77.9%); best-of-three: 260–66 (79.8%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Dominant season: 1973 — 65–3 (95.6%) from 68 matches. A campaign of 65 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.

Historic: 43 consecutive wins on clay — one of the longest winning streaks on this surface in the Open Era. To sustain that level across so many matches demands physical and mental consistency that very few players in history have matched.