Tigran Martirosyan defeated Bradley Klahn 6-3 4-6 6-3 in the USA F15 qualifying round on clay. The upset overturned the form book — Bradley Klahn came in leading the head-to-head 1–0. Tigran Martirosyan claimed a first win over Bradley Klahn in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-06 | USA F16 | R32 | clay | Bradley Klahn | 6-3 3-6 7-6(13) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.