Nil Boixader Roca defeated M. L. Alvarez Sarmiento 7-5 6-0 in the M25 Gurb 1 q64 on clay. The upset overturned the form book — M. L. Alvarez Sarmiento came in leading the head-to-head 1–0. Nil Boixader Roca claimed a first win over M. L. Alvarez Sarmiento in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-05-29 | M25 La Nucia 1 | Q64 | clay | M. L. Alvarez Sarmiento | 6-0 6-3 |