Santiago Giraldo defeated Carlos Avellan 7-5 6-4 in the Brazil F6 qualifying round on clay. The upset overturned the form book — Carlos Avellan came in leading the head-to-head 2–0. Santiago Giraldo claimed a first win over Carlos Avellan in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-08 | Colombia F4 | QF | clay | Carlos Avellan | 6-3 6-2 |
| 2002-06-10 | Colombia F1 | R32 | clay | Carlos Avellan | 6-0 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.