Coco Vandeweghe defeated Klara Koukalova 6-4 7-6 in the Tokyo round of 64 on hard. The upset overturned the form book — Klara Koukalova came in leading the head-to-head 2–1. Coco Vandeweghe narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-15 | Birmingham | R64 | grass | Klara Koukalova | 7-5 6-3 |
| 2014-06-16 | s Hertogenbosch | SF | grass | Coco Vandeweghe | 6-4 6-2 |
| 2014-06-09 | Birmingham | R16 | grass | Klara Koukalova | 3-6 7-6(3) 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 (200 vs 76). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About