Mikhail Biryukov defeated Anton Zaitsev 3-6 7-5 6-2 in the Russia F12 qualifying round on clay. The upset overturned the form book — Anton Zaitsev came in leading the head-to-head 2–0. Mikhail Biryukov claimed a first win over Anton Zaitsev in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-19 | Russia F11 | F | clay | Anton Zaitsev | 4-6 6-4 6-2 |
| 2012-07-30 | Russia F10 | QF | clay | Anton Zaitsev | 6-4 7-5 |
Averages over each player's completed matches in the selected window (3 vs 33). 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