Shuichi Sekiguchi defeated Long Chen 6-0 6-0 in the China F4 round of 32 on hard.
Sekiguchi S. took it in straight sets.
Shuichi Sekiguchi beat Long Chen 6-0 6-0. Umpiry, "Shuichi Sekiguchi vs Long Chen — China F4 Round of 32", https://umpiry.com/match/2017-04-03/chen-vs-sekiguchi-china-f4-r32?utm_source=cite (as of 3 April 2017).