Jan Hajek defeated Artemon Apostu Efremov 6-2 6-0 in the Slovak Rep F1 round of 16 on clay. The upset overturned the form book — Artemon Apostu Efremov came in leading the head-to-head 2–1. Jan Hajek narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-01-06 | Spain 1 4 | QF | clay | Jan Hajek | 7-6(2) 6-3 |
| 2001-03-19 | Egypt 1 2 | R32 | clay | Artemon Apostu Efremov | 7-6(7) 6-3 |
| 2001-03-19 | Egypt 1 4 | QF | clay | Artemon Apostu Efremov | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.