Miguel Gallardo Valles defeated Michael Quintero 7-5 6-4 in the Colombia F3 qualifying round on clay. The upset overturned the form book — Michael Quintero came in leading the head-to-head 2–0. Miguel Gallardo Valles claimed a first win over Michael Quintero in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-27 | Mexico F10 | QF | hard | Michael Quintero | 6-3 7-6(5) |
| 2010-04-26 | Mexico F2 | R16 | hard | Michael Quintero | 6-0 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.