Paul Ender defeated Alvaro Peiro Serrano 6-4 6-2 in the M25 Tarragona 1 q64 on clay. The upset overturned the form book — Alvaro Peiro Serrano came in leading the head-to-head 1–0. Paul Ender claimed a first win over Alvaro Peiro Serrano in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-02-09 | M15 Valencia 2 | Q64 | clay | Alvaro Peiro Serrano | 6-7(2) 6-1 10-6 |