Guillermo Olaso advanced when Alexander Flock retired 1-6 6-4 3-0 in the Spain F16 qualifying round. Guillermo Olaso claimed a first win over Alexander Flock in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-03-17 | Spain F11 | R16 | clay | Alexander Flock | 6-7(4) 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.