Grace Min defeated Andrea Hlavackova 6-4 6-1 in the US Open qualifying round of 32 on hard. The upset overturned the form book — Andrea Hlavackova came in defending last year's round of 16.
Min G. took it in straight sets.
Min G. and Hlavackova A. faced 3 of the same opponents in the last 12 months. Min G. went 1–2 (33%) against them, Hlavackova A. 3–0 (100%). Only 1 of the comparisons are context-comparable — too few for a conclusion.
Only 3 common opponents — small sample, treat as indicative.
Grace Min beat Andrea Hlavackova 6-4 6-1. Umpiry, "Grace Min vs Andrea Hlavackova — US Open Qualifying Round of 32", https://umpiry.com/match/2013-08-23/hlavackova-vs-min-us-open-q32?utm_source=cite (as of 23 August 2013).