Jerzy Janowicz defeated Pierrick Ysern 6-4 4-6 6-3 in the Marseille q32 on hard. The upset overturned the form book — Pierrick Ysern came in leading the head-to-head 1–0, but Jerzy Janowicz had been the form player, winning 3 of their last 5 on hard. Jerzy Janowicz claimed a first win over Pierrick Ysern in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-05 | France F17 | R16 | hard | Pierrick Ysern | 7-6(3) 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.