Alexander Flock defeated Marc Fornell Mestres 6-1 6-2 in the Spain F12 semi-final on clay. The upset overturned the form book — Marc Fornell Mestres came in leading the head-to-head 2–0. Alexander Flock claimed a first win over Marc Fornell Mestres in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-24 | Spain F3 | R32 | clay | Marc Fornell Mestres | 6-4 7-5 |
| 2008-03-17 | Spain F11 | QF | clay | Marc Fornell Mestres | 1-6 7-6(4) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.