Steven Diez defeated Marcelo Palacios Siegenthale 6-3 6-2 in the Spain F15 round of 16 on clay. The result followed the form book — Steven Diez came in leading the head-to-head 3–0. Steven Diez extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-10-18 | Spain F37 | R32 | clay | Steven Diez | 6-4 6-3 |
| 2009-07-13 | Spain F23 | R32 | clay | Steven Diez | 7-6(4) 6-2 |
| 2008-09-22 | Spain F36 | R32 | hard | Steven Diez | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.