Key dates: Singles final, Aug. 1; team medals on Aug. 7 Venue: ExCeL Exhibition Centre Big story: The Chinese arrive in London amid some controversy. Though Guo Yan earned an automatic berth, officials recently announced that she had suffered an unspecified injury and replaced her with top-ranked Ding Ning. Top U.S. prospects: Ariel Hsing leads the Americans, playing in her first Olympics at age 16. She will be joined by another teenager, Lily Zhang. Erica Wu will play only in the team event. None of the Americans rank in the Top 100. Others to watch: Who can put pressure on Ding for the individual title? Kim Kyungah of South Korea and Kasumi Ishikawa of Japan rank among the top contenders. Little-known fact: Table tennis dates back to 19th century England, where it was known as "wiff-waff" and served as after-dinner entertainment for upper-class families. It is now the biggest participation sport in the world.
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