I. Gaztambide Arrastia defeated M. Lazaro Juncadella 7-6 6-2 in the M15 Mungia-Laukariz 1 round of 32 on clay. The upset overturned the form book — M. Lazaro Juncadella came in ranked #1287, leading the head-to-head 1–0. I. Gaztambide Arrastia claimed a first win over M. Lazaro Juncadella in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-06-24 | M25 Bakio 1 | Q32 | hard | M. Lazaro Juncadella | 6-2 6-1 |