Hans Kary has found clay courts difficult, recording 111–146 across 257 matches (43.2%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Hans Kary has reached 1 final without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): Hans Kary has struggled at Grand Slam level on clay: 4–11 (26.7%) in 15 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

One final reached on clay, without converting it into a title. That final-round experience is valuable groundwork for going one step further next time. 5 semifinals. 12 quarterfinals.

vs. Top 10 on clay: 0–18 (0.0%, 18 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: 12–23 (34.3%); best-of-three: 99–123 (44.6%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Peak season: 1976 — 24–23 (51.1%) from 47 matches. That year captures the ceiling of what Hans Kary can do on clay when performing at their best and represents the standard to aim for.