Alexandru Cristian Dumitru defeated Samuil Konov 7-5 6-2 in the M25+H Bacau 1 q64 on clay. The upset overturned the form book — Samuil Konov came in leading the head-to-head 1–0. Alexandru Cristian Dumitru claimed a first win over Samuil Konov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-23 | M15 Bucharest 1 | Q64 | clay | Samuil Konov | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.