Shuichi Sekiguchi defeated Bowen Ouyang 6-4 6-4 in the China F5 qualifying round on hard. The upset overturned the form book — Bowen Ouyang came in leading the head-to-head 1–0, but Shuichi Sekiguchi had been the form player, winning 8 of their last 10 on hard. Shuichi Sekiguchi claimed a first win over Bowen Ouyang in two meetings, levelling the head-to-head at 1–1.
Sekiguchi S. took it in straight sets.
Shuichi Sekiguchi beat Bowen Ouyang 6-4 6-4. Umpiry, "Shuichi Sekiguchi vs Bowen Ouyang — China F5 Qualifying Round", https://umpiry.com/match/2016-04-11/ouyang-vs-sekiguchi-china-f5-qf?utm_source=cite (as of 11 April 2016).