Monica Niculescu defeated Kiki Bertens 6-3 6-3 in the Luxembourg semi-final on hard. The upset overturned the form book — Kiki Bertens came in leading the head-to-head 2–0, but Monica Niculescu had been the form player, winning 2 of their last 4 on hard. Monica Niculescu claimed a first win over Kiki Bertens in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-09-25 | Wuhan | R64 | hard | Kiki Bertens | 6-2 6-1 |
| 2017-05-15 | Rome | R64 | clay | Kiki Bertens | 2-6 6-2 6-1 |
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 (192 vs 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About