Gaston Gaudio advanced when Nicolas Kiefer retired 7-5 5-2 in the Monte Carlo Masters round of 32. Gaston Gaudio claimed a first win over Nicolas Kiefer in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-22 | Dusseldorf | RR | clay | Nicolas Kiefer | 6-2 6-3 |
| 2005-03-07 | Indian Wells Masters | R32 | hard | Nicolas Kiefer | 6-3 6-1 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (150 vs 174). ATP, WTA & Challenger.