Hyojung Yea defeated Ha Young Ji 6-2 6-4 in the Changwon 25K qualifying round of 64 on hard. The upset overturned the form book — Ha Young Ji came in leading the head-to-head 1–0, but Hyojung Yea had been the form player, winning 6 of their last 10 on hard. Hyojung Yea claimed a first win over Ha Young Ji in two meetings, levelling the head-to-head at 1–1.
Yea H. took it in straight sets.
Hyojung Yea beat Ha Young Ji 6-2 6-4. Umpiry, "Hyojung Yea vs Ha Young Ji — Changwon 25K Qualifying Round of 64", https://umpiry.com/match/2011-05-23/ji-vs-yea-changwon-25k-q64?utm_source=cite (as of 23 May 2011).