Shuichi Sekiguchi advanced when Andriej Kapas retired 5-7 6-2 4-2 in the China F5 qualifying round.
Sekiguchi S. advanced when Kapas A. retired.
Shuichi Sekiguchi beat Andriej Kapas 5-7 6-2 4-2 after Andriej Kapas retired. Umpiry, "Shuichi Sekiguchi vs Andriej Kapas — China F5 Qualifying Round", https://umpiry.com/match/2017-04-10/kapas-vs-sekiguchi-china-f5-qf?utm_source=cite (as of 10 April 2017).