Guillermo Olaso defeated Nicolas Mahut 7-6 6-7 6-3 in the Lille CH round of 16 on hard. The upset overturned the form book — Nicolas Mahut came in leading the head-to-head 1–0, but Guillermo Olaso had been the form player, winning 6 of their last 7 on hard. Guillermo Olaso claimed a first win over Nicolas Mahut in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-14 | Australian Open | Q64 | hard | Nicolas Mahut | 6-7(6) 7-5 6-3 |
Averages over each player's completed matches in the selected window (30 vs 63). 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. About