Yuuya Kibi defeated Woong Sun Jun 6-2 6-7 6-2 in the Japan F4 round of 16 on hard. The upset overturned the form book — Woong Sun Jun came in leading the head-to-head 1–0, but Yuuya Kibi had been the form player, winning 2 of their last 5 on hard. Yuuya Kibi claimed a first win over Woong Sun Jun in two meetings, levelling the head-to-head at 1–1.
Kibi Y. came through in three sets.
Yuuya Kibi beat Woong Sun Jun 6-2 6-7(7) 6-2. Umpiry, "Yuuya Kibi vs Woong Sun Jun — Japan F4 Round of 16", https://umpiry.com/match/2014-03-31/jun-vs-kibi-japan-f4-r16?utm_source=cite (as of 31 March 2014).