Jan Kobierski defeated Sergei Pogosian 1-6 7-6 10-6 in the M15 Antalya 21 q64 on clay. The upset overturned the form book — Sergei Pogosian came in leading the head-to-head 1–0. Jan Kobierski claimed a first win over Sergei Pogosian in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-06-05 | M25 Kursumlijska Banja 3 | Q32 | clay | Sergei Pogosian | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.