Monica Niculescu defeated Lara Arruabarrena 6-0 2-6 6-4 in the Miami qualifying round 1 on hard. The upset overturned the form book — Lara Arruabarrena came in leading the head-to-head 4–1, but Monica Niculescu had been the form player, winning 2 of their last 4 on hard. Monica Niculescu narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-09-09 | Nanchang | R32 | hard | Lara Arruabarrena | 1-6 6-3 4-1 RET |
| 2017-10-09 | Linz | R32 | hard | Lara Arruabarrena | 1-6 6-1 2-0 RET |
| 2016-09-19 | Seoul | F | hard | Lara Arruabarrena | 6-0 2-6 6-0 |
| 2015-08-03 | Washington | R32 | hard | Monica Niculescu | 7-5 6-4 |
| 2011-04-04 | Marbella | R32 | clay | Lara Arruabarrena | 7-5 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (59 vs 76). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About