Carlos Avellan defeated Michael Quintero 1-6 6-3 6-2 in the Ecuador F2 round of 16 on hard. The upset overturned the form book — Michael Quintero came in leading the head-to-head 2–0. Carlos Avellan claimed a first win over Michael Quintero in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-30 | Colombia F3 | SF | clay | Michael Quintero | 6-2 6-3 |
| 2003-05-26 | Colombia F1B | R32 | clay | Michael Quintero | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.