Alexander Zgirovsky defeated Boris Butulija 6-2 6-4 in the M15 Kazan 3 quarter-final on hard. The upset overturned the form book — Boris Butulija came in ranked #1279, leading the head-to-head 1–0. Alexander Zgirovsky claimed a first win over Boris Butulija in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-30 | M25 Telavi 1 | R32 | clay | Boris Butulija | 6-2 7-6(11) |
Averages over each player's completed matches in the selected window (137 vs 200). 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