Riko Sawayanagi defeated Ayumi Oka 7-5 2-6 7-6 in the Tsukuba 25K qualifying round of 32 on hard.
Sawayanagi R. came through in three sets.
Riko Sawayanagi beat Ayumi Oka 7-5 2-6 7-6(2). Umpiry, "Riko Sawayanagi vs Ayumi Oka — Tsukuba 25K Qualifying Round of 32", https://umpiry.com/match/2011-08-29/oka-vs-sawayanagi-tsukuba-25k-q32?utm_source=cite (as of 29 August 2011).