Ivan Lendl has been dominant on clay, posting 329–77 across 406 matches (81.0% — exceptional). Few players in the Open Era have sustained that level of dominance across a full career on clay. With 28 titles, among the most prolific clay court champions in the Open Era: Houston WCT, Barcelona, Tokyo-1, Madrid and 15 more.

At Grand Slam level (Roland Garros): Ivan Lendl has been outstanding — 53–12 (81.5%) across 65 matches. Winning more than 7 in 10 Grand Slam matches on clay is the benchmark of an all-time great on this surface.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Ivan Lendl is 4–7 (36.4%) across 11 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole clay swing.

41 finals reached on clay — won 28, lost 13 (solid 68% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 50 semifinals. 66 quarterfinals.

vs. Top 10 on clay: 44–22 (66.7%, 66 matches). Winning above .500 against the world's best on clay is a benchmark of genuine elite quality on this surface.

By format on clay — best-of-five: 77–23 (77.0%); best-of-three: 252–54 (82.4%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Peak season: 1986 — 17–1 (94.4%) from 18 matches. That year captures the ceiling of what Ivan Lendl can do on clay when performing at their best and represents the standard to aim for.

Ivan Lendl assembled a remarkable 23-match winning streak on clay — a run of that length goes far beyond form and into a different level of dominance on this surface.