
Pedro Sakamoto defeated Guillermo Rivera Aranguiz 6-3 6-2 in the Santiago CH qualifying round 2 on clay. The upset overturned the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 1–0, defending last year's round of 32, but Pedro Sakamoto had been the form player, winning 5 of their last 10 on clay. Pedro Sakamoto claimed a first win over Guillermo Rivera Aranguiz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-04 | Colombia F2 | R32 | clay | Guillermo Rivera Aranguiz | 6-2 6-2 |
Averages over each player's completed matches in the selected window (200 vs 29). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About