Yan Bai defeated Issei Okamura 6-0 6-1 in the China F2 round of 32 on clay.
Bai Y. took it in straight sets.
Yan Bai beat Issei Okamura 6-0 6-1. Umpiry, "Yan Bai vs Issei Okamura — China F2 Round of 32", https://umpiry.com/match/2015-04-06/bai-vs-okamura-china-f2-r32?utm_source=cite (as of 6 April 2015).