Florencia Labat defeated Nathalie Tauziat 7-5 6-4 in the US Open round of 128 on hard. The upset overturned the form book — Nathalie Tauziat came in leading the head-to-head 2–0, defending last year's round of 32. Florencia Labat claimed a first win over Nathalie Tauziat in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-29 | Roland Garros | R64 | clay | Nathalie Tauziat | 6-1 6-3 |
| 1997-02-10 | Paris | R32 | carpet | Nathalie Tauziat | 6-1 6-2 |