Zarina Diyas defeated Oksana Kalashnikova 7-6 4-6 6-0 in the Kunming 25K qualifying round on hard. The upset overturned the form book — Oksana Kalashnikova came in leading the head-to-head 1–0, but Zarina Diyas had been the form player, winning 3 of their last 7 on hard. Zarina Diyas claimed a first win over Oksana Kalashnikova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-18 | Roland Garros | Q128 | clay | Oksana Kalashnikova | 6-4 6-1 |
Averages over each player's completed matches in the selected window (199 vs 35). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About