Jan Leschly has a competitive clay court record of 15–14 across 29 matches (51.7%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Jan Leschly has reached 1 final without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): 2–1 across just 3 matches — still very early days at this level on clay.

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. 2 semifinals. 3 quarterfinals.

By format on clay — best-of-five: 12–9 (57.1%); best-of-three: 3–5 (37.5%). Significantly better in five-set matches — a strong physical profile on clay that tends to tell as matches and tournaments progress.

Best season: 1971 — 12–10 (54.5%) from 22 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.

Jan Leschly recorded a notable 6-match winning streak on clay — a run that demonstrates consistency across consecutive draws on this surface.