Kirsten Flipkens defeated Alison Riske 2-6 7-6 6-3 in the Australian Open round of 128 on hard. The upset overturned the form book — Alison Riske came in leading the head-to-head 1–0, defending last year's round of 32. Kirsten Flipkens claimed a first win over Alison Riske in two meetings, levelling the head-to-head at 1–1.
Flipkens K. came through in three sets.
Flipkens K. and Riske A. faced 3 of the same opponents in the last 12 months. Flipkens K. went 2–1 (67%) against them, Riske A. 2–1 (67%). Results against comparable opponents are close (1 : 1 better-results split).
Only 3 common opponents — small sample, treat as indicative.
Kirsten Flipkens beat Alison Riske 2-6 7-6(6) 6-3. Umpiry, "Kirsten Flipkens vs Alison Riske — Australian Open Round of 128", https://umpiry.com/match/2018-01-15/flipkens-vs-riske-australian-open-r128?utm_source=cite (as of 15 January 2018).