Nicolas Kiefer defeated Andrea Gaudenzi 7-5 6-4 0-6 6-4 in the US Open round of 128 on hard. The upset overturned the form book — Andrea Gaudenzi came in leading the head-to-head 1–0, defending last year's round of 128. Nicolas Kiefer claimed a first win over Andrea Gaudenzi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-22 | St. Poelten | R32 | clay | Andrea Gaudenzi | 6-7(4) 3-0 RET |
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 (200 vs 105). ATP, WTA & Challenger.