Su Wei Hsieh defeated Barbora Strycova 0-6 6-2 6-2 in the Auckland quarter-final on hard. The upset overturned the form book — Barbora Strycova came in leading the head-to-head 3–2, defending last year's quarter-final. That levelled the head-to-head at 3–3.
Hsieh S. came through in three sets.
Hsieh S. and Strycova B. faced 6 of the same opponents in the last 12 months. Hsieh S. went 1–7 (13%) against them, Strycova B. 6–0 (100%). Strycova B. came out clearly better against 6 of 6 comparable opponents, Hsieh S. against 0.
Su Wei Hsieh beat Barbora Strycova 0-6 6-2 6-2. Umpiry, "Su Wei Hsieh vs Barbora Strycova — Auckland Quarter-final", https://umpiry.com/match/2018-01-06/hsieh-vs-strycova-auckland-qf?utm_source=cite (as of 6 January 2018).