Maria Joao Koehler defeated Olivia Rogowska 6-2 6-2 in the US Open qualifying round of 32 on hard. The upset overturned the form book — Olivia Rogowska came in defending last year's round of 128.
Koehler M. took it in straight sets.
Koehler M. and Rogowska O. faced 1 of the same opponent in the last 12 months. Koehler M. went 0–1 (0%) against them, Rogowska O. 0–1 (0%).
Only 1 common opponent — too few for any conclusion. Shown without assessment.
Maria Joao Koehler beat Olivia Rogowska 6-2 6-2. Umpiry, "Maria Joao Koehler vs Olivia Rogowska — US Open Qualifying Round of 32", https://umpiry.com/match/2013-08-23/koehler-vs-rogowska-us-open-q32?utm_source=cite (as of 23 August 2013).