Artem Sitak defeated Andrey Kumantsov 6-2 4-6 6-4 in the USA F4 qualifying round on hard. The upset overturned the form book — Andrey Kumantsov came in leading the head-to-head 1–0. Artem Sitak claimed a first win over Andrey Kumantsov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-02-25 | USA F5 | R32 | hard | Andrey Kumantsov | 6-1 6-2 |
Averages over each player's completed matches in the selected window (7 vs 2). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About