Carlos Calderon Rodriguez defeated Marcelo Palacios Siegenthale 6-0 3-6 6-0 in the Spain F28 qualifying round on clay. The upset overturned the form book — Marcelo Palacios Siegenthale came in leading the head-to-head 4–0. Carlos Calderon Rodriguez claimed a first win over Marcelo Palacios Siegenthale in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-07-12 | Spain F25 | R32 | clay | Marcelo Palacios Siegenthale | 6-0 6-2 |
| 2010-02-15 | Spain F6 | R32 | clay | Marcelo Palacios Siegenthale | 7-6(5) 7-6(5) |
| 2009-07-27 | Spain F25 | R32 | clay | Marcelo Palacios Siegenthale | 4-6 7-5 6-3 |
| 2008-05-12 | Spain F19 | R32 | clay | Marcelo Palacios Siegenthale | 6-3 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.