Boris Butulija defeated Alexander Crnokrak 6-4 6-1 in the M15 Monastir 26 round of 32 on hard. The upset overturned the form book — Alexander Crnokrak came in leading the head-to-head 2–0. Boris Butulija claimed a first win over Alexander Crnokrak in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2022-06-14 | M15 Monastir 23 | R32 | hard | Alexander Crnokrak | 3-6 6-4 7-6(3) |
| 2019-05-30 | M25 Nonthaburi 2 | R16 | hard | Alexander Crnokrak | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.