Gerard Granollers defeated Marcelo Palacios Siegenthale 5-7 7-5 6-3 in the Spain F25 qualifying round on clay. The upset overturned the form book — Marcelo Palacios Siegenthale came in leading the head-to-head 2–1, but Gerard Granollers had been the form player, winning 3 of their last 6 on clay. Gerard Granollers narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-17 | Spain F17 | R32 | clay | Gerard Granollers | 6-4 6-0 |
| 2009-03-16 | Spain F10 | QF | clay | Marcelo Palacios Siegenthale | 6-4 5-7 6-1 |
| 2009-02-23 | Spain F7 | R32 | clay | Marcelo Palacios Siegenthale | 3-6 6-3 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.