Lionel Noviski defeated Michael Quintero 6-1 6-4 in the Colombia F1 round of 16 on clay. The upset overturned the form book — Michael Quintero came in leading the head-to-head 2–0, but Lionel Noviski had been the form player, winning 5 of their last 8 on clay. Lionel Noviski claimed a first win over Michael Quintero in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-01-30 | Colombia F2 | R32 | clay | Michael Quintero | 6-2 3-0 |
| 2004-09-20 | Bolivia F1 | R16 | clay | Michael Quintero | 5-7 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.