Bastian Malla defeated Gonzalo Villanueva 6-4 6-4 in the Chile F5 qualifying round on clay. The upset overturned the form book — Gonzalo Villanueva came in ranked #321, leading the head-to-head 2–1. Bastian Malla narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-20 | M15 Asuncion 2 | QF | clay | Gonzalo Villanueva | 4-6 6-1 7-5 |
| 2015-02-16 | Chile F1 | R16 | clay | Gonzalo Villanueva | 6-1 6-7(5) 7-6(2) |
| 2013-11-11 | Chile F7 | R32 | clay | Bastian Malla | 6-3 6-4 |
Averages over each player's completed matches in the selected window (200 vs 199). 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