Javier Barranco Cosano defeated Alvaro Lopez San Martin 6-1 6-4 in the M25 Oviedo 1 semi-final on clay. The upset overturned the form book — Alvaro Lopez San Martin came in leading the head-to-head 3–1, but Javier Barranco Cosano had been the form player, winning 7 of their last 10 on clay. Javier Barranco Cosano narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-24 | M25 Gandia 1 | SF | clay | Javier Barranco Cosano | 7-5 6-3 |
| 2021-05-12 | M15 Valldoreix 1 | R32 | clay | Alvaro Lopez San Martin | 6-1 6-2 |
| 2020-03-05 | M25 Murcia 1 | R16 | clay | Alvaro Lopez San Martin | 6-4 6-3 |
| 2019-03-24 | M15 Murcia 1 | F | clay | Alvaro Lopez San Martin | 7-5 6-1 |
Averages over each player's completed matches in the selected window (165 vs 35). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About