Ashleigh Barty defeated Petra Kvitova 6-4 6-2 in the Shenzhen round robin on hard. The upset overturned the form book — Petra Kvitova came in leading the head-to-head 4–2, but Ashleigh Barty had been the form player, winning 4 of their last 4 on hard. Ashleigh Barty narrowed the head-to-head to 4–3.
Barty A. took it in straight sets.
Barty A. and Kvitova P. faced 20 of the same opponents in the last 12 months. Barty A. went 26–6 (81%) against them, Kvitova P. 20–12 (63%). Barty A. came out better against 6 of 20 comparable opponents, Kvitova P. against 2 — though 1 of those edges carries caveats (retirement).
Hard: Barty A. leads 3–2 · Grass: Kvitova P. leads 1–0 · Clay: Kvitova P. leads 1–0
Ashleigh Barty beat Petra Kvitova 6-4 6-2. Umpiry, "Ashleigh Barty vs Petra Kvitova — Shenzhen Round Robin", https://umpiry.com/match/2019-10-31/barty-vs-kvitova-shenzhen-rr?utm_source=cite (as of 31 October 2019).