Gustavo Vellbach defeated Carlos Arbiza Torrens 6-2 6-2 in the Venezuela F4 round of 32 on hard. The upset overturned the form book — Carlos Arbiza Torrens came in leading the head-to-head 1–0. Gustavo Vellbach claimed a first win over Carlos Arbiza Torrens in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-05 | Venezuela F3 | Q16 | hard | Carlos Arbiza Torrens | 6-7(5) 6-1 7-6(9) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.