Julio Cesar Porras defeated Sergi Perez Contri 4-6 6-3 6-4 in the M15 Castellon 1 quarter-final on clay. The upset overturned the form book — Sergi Perez Contri came in leading the head-to-head 3–1, but Julio Cesar Porras had been the form player, winning 3 of their last 5 on clay. Julio Cesar Porras narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-05-29 | M15 La Nucia 1 | R16 | clay | Sergi Perez Contri | 6-2 6-7(2) 6-0 |
| 2025-02-18 | M15 Villena 1 | R32 | hard | Sergi Perez Contri | 6-3 6-1 |
| 2024-09-07 | M15 Madrid 1 | SF | clay | Julio Cesar Porras | 6-7(5) 6-3 7-5 |
| 2022-11-30 | M15 Madrid 3 | R32 | hard | Sergi Perez Contri | 6-7(5) 6-3 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.