Darya Kustova defeated Ekaterina Bychkova 6-0 7-5 in the Petange 100K round of 32 on clay. The upset overturned the form book — Ekaterina Bychkova came in leading the head-to-head 2–0. Darya Kustova claimed a first win over Ekaterina Bychkova in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-02 | Moscow 25K | F | clay | Ekaterina Bychkova | 6-2 7-5 |
| 2009-09-14 | Mestre 50K | QF | clay | Ekaterina Bychkova | 7-5 3-6 7-6(4) |
Averages over each player's completed matches in the selected window (5 vs 34). 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