Boris Arias defeated Sergio Galdos 3-6 6-4 6-2 in the Peru F4 round of 32 on clay. The upset overturned the form book — Sergio Galdos came in leading the head-to-head 2–0. Boris Arias claimed a first win over Sergio Galdos in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-08 | Peru F1 | R16 | clay | Sergio Galdos | 7-5 3-6 7-6(9) |
| 2009-09-07 | Bolivia F3 | R32 | clay | Sergio Galdos | 6-3 6-0 |
Averages over each player's completed matches in the selected window (86 vs 30). 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