Jeroen Masson defeated Martin Klizan 7-6 6-1 in the Romania F2 round of 16 on clay. The upset overturned the form book — Martin Klizan came in leading the head-to-head 1–0, but Jeroen Masson had been the form player, winning 4 of their last 6 on clay. Jeroen Masson claimed a first win over Martin Klizan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-30 | Romania F1 | R16 | clay | Martin Klizan | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.