Nikola Keremedchiev defeated George Lazarov 2-6 7-6 10-3 in the M15 Sozopol 2 q16 on hard. The upset overturned the form book — George Lazarov came in leading the head-to-head 2–0. Nikola Keremedchiev claimed a first win over George Lazarov in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-08-03 | M15 Sofia 1 | Q32 | clay | George Lazarov | 7-6(5) 6-4 |
| 2024-08-12 | M15 Sofia 1 | Q32 | clay | George Lazarov | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.