Nicolas Kiefer has a competitive clay court record of 57–67 across 124 matches (46.0%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Nicolas Kiefer has reached 2 finals without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): Nicolas Kiefer is 9–10 (47.4%) across 19 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Nicolas Kiefer is 20–27 (42.6%) across 47 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole clay swing.

2 finals reached on clay — none converted into a title yet. Reaching 2 finals is a mark of real quality, but the gap between finalist and champion is one of the finest lines in the sport. 1 semifinal. 7 quarterfinals.

vs. Top 10 on clay: 8–12 (40.0%, 20 matches). Competitive against the elite, but still narrowly below .500 — closing that gap would directly elevate the overall clay court profile.

By format on clay — best-of-five: 10–11 (47.6%); best-of-three: 47–56 (45.6%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 2005 — 8–5 (61.5%) from 13 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.