Guillermo Rivera Aranguiz defeated Juan Sebastian Vivanco 7-6 6-0 in the Chile F1 round of 32 on clay. The upset overturned the form book — Juan Sebastian Vivanco came in leading the head-to-head 2–0. Guillermo Rivera Aranguiz claimed a first win over Juan Sebastian Vivanco in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-15 | Chile F9 | R32 | clay | Juan Sebastian Vivanco | 6-3 3-6 6-1 |
| 2008-11-03 | Chile F5 | R32 | clay | Juan Sebastian Vivanco | 2-6 7-6(3) 7-6(8) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.