Nicholas Kalogeropoulos has a competitive clay court record of 30–35 across 65 matches (46.2%). The record shows a player capable of competing here, though there is clear room to push the win rate higher.

At Grand Slam level (Roland Garros): Nicholas Kalogeropoulos has struggled at Grand Slam level on clay: 2–6 (25.0%) in 8 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

2 semifinals on clay without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 3 quarterfinals adds further depth to that picture.

By format on clay — best-of-five: 12–17 (41.4%); best-of-three: 18–18 (50.0%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Best season: 1968 — 8–6 (57.1%) from 14 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.