Walter Valarezo defeated Sebastian Rivera 6-3 3-6 6-2 in the Ecuador F5 round of 32 on clay. The upset overturned the form book — Sebastian Rivera came in leading the head-to-head 1–0. Walter Valarezo claimed a first win over Sebastian Rivera in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-29 | Ecuador F6 | R16 | clay | Sebastian Rivera | 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.