Seiko Okamoto defeated Yi Chen 6-4 6-1 in the Beijing 25K round of 32 on hard.
Okamoto S. took it in straight sets.
Seiko Okamoto beat Yi Chen 6-4 6-1. Umpiry, "Seiko Okamoto vs Yi Chen — Beijing 25K Round of 32", https://umpiry.com/match/2007-10-08/chen-vs-okamoto-beijing-25k-r32?utm_source=cite (as of 8 October 2007).