Gabriel Alejandro Hidalgo defeated Murkel Dellien 3-6 7-6 6-4 in the M15 Cordoba 2 quarter-final on clay. The upset overturned the form book — Murkel Dellien came in leading the head-to-head 1–0. Gabriel Alejandro Hidalgo claimed a first win over Murkel Dellien in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-03-08 | M25 Rio Cuarto 1 | R32 | clay | Murkel Dellien | 6-1 7-6(3) |