Nickolai Dyachok defeated Artemon Apostu Efremov 7-6 6-4 in the Romania F14 qualifying round on clay. The upset overturned the form book — Artemon Apostu Efremov came in leading the head-to-head 3–0. Nickolai Dyachok claimed a first win over Artemon Apostu Efremov in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-26 | Romania F13 | R16 | clay | Artemon Apostu Efremov | 6-1 6-4 |
| 2004-07-19 | Romania F12 | QF | clay | Artemon Apostu Efremov | 6-1 7-6(5) |
| 2002-08-19 | Russia F2 | QF | clay | Artemon Apostu Efremov | 7-6(4) 6-3 |