Artem Sitak defeated Vladimir Obradovic 6-2 6-4 in the USA F6 semi-final on hard. The upset overturned the form book — Vladimir Obradovic came in leading the head-to-head 2–0. Artem Sitak claimed a first win over Vladimir Obradovic in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-30 | Mexico F5 | R16 | hard | Vladimir Obradovic | 4-6 6-3 6-2 |
| 2011-05-23 | Mexico F4 | R32 | hard | Vladimir Obradovic | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.