Facundo Arguello defeated Joao Souza 4-6 6-3 6-4 in the Santiago CH round of 32 on clay. The upset overturned the form book — Joao Souza came in leading the head-to-head 2–0, defending last year's round of 32. Facundo Arguello claimed a first win over Joao Souza in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-02-01 | Quito | R32 | clay | Joao Souza | 6-3 7-6(7) |
| 2015-02-16 | Rio de Janeiro | R32 | clay | Joao Souza | 6-2 6-1 |
Averages from each player's recent completed matches (3 vs 20). ATP, WTA & Challenger.