Marcelo Palacios Siegenthale defeated Santos Sanchez Patino 6-2 6-2 in the Spain F19 round of 32 on hard. The upset overturned the form book — Santos Sanchez Patino came in leading the head-to-head 1–0. Marcelo Palacios Siegenthale claimed a first win over Santos Sanchez Patino in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-10 | Spain F16 | R32 | clay | Santos Sanchez Patino | 6-4 6-1 |