Anna Arina Marenko defeated Nadejda Guskova 7-6 6-0 in the Kharkiv 25K round of 16 on clay. The upset overturned the form book — Nadejda Guskova came in leading the head-to-head 1–0. Anna Arina Marenko claimed a first win over Nadejda Guskova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-16 | St Petersburg 10K | F | clay | Nadejda Guskova | 6-2 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.