Margarita Lazareva defeated Federica Quercia 6-4 2-6 6-3 in the La Marsa 25K qualifying round of 16 on clay. The upset overturned the form book — Federica Quercia came in leading the head-to-head 1–0. Margarita Lazareva claimed a first win over Federica Quercia in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-26 | St Cugat 10K | R32 | clay | Federica Quercia | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.