Lucia Cortez Llorca defeated Alina Charaeva 6-4 6-1 in the W35 Getxo 1 quarter-final on clay. The upset overturned the form book — Alina Charaeva came in leading the head-to-head 2–1, but Lucia Cortez Llorca had been the form player, winning 7 of their last 8 on clay. Lucia Cortez Llorca narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-16 | W60 San Bartolome de Tirajana | Q32 | clay | Alina Charaeva | 6-4 7-5 |
| 2021-04-13 | W15 Antalya 15 | R32 | clay | Lucia Cortez Llorca | 6-0 6-3 |
| 2020-10-27 | W15 Platja D'Aro 1 | R32 | clay | Alina Charaeva | 3-6 7-6(5) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.