Sebastian Rivera defeated Walter Valarezo 6-1 6-1 in the Ecuador F6 round of 16 on clay. The upset overturned the form book — Walter Valarezo came in leading the head-to-head 1–0. Sebastian Rivera claimed a first win over Walter Valarezo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-22 | Ecuador F5 | R32 | clay | Walter Valarezo | 6-3 3-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.