Nadejda Guskova defeated Anna Arina Marenko 6-2 7-6 in the St Petersburg 10K final on clay. The upset overturned the form book — Anna Arina Marenko came in leading the head-to-head 1–0, but Nadejda Guskova had been the form player, winning 4 of their last 7 on clay. Nadejda Guskova claimed a first win over Anna Arina Marenko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-07-19 | Kharkiv 25K | R16 | clay | Anna Arina Marenko | 7-6(1) 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.