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Chinese swimmer Chen fails doping test - Xinhua

Chinese Olympic women's swimmer Chen Xinyi tests positive for a banned substance at the Rio Olympics.

Brock Lesnar's in-competition sample also tested positive, says UFC

Brock Lesnar has tested positive for an unnamed substance in an in-competition sample taken on the night of his UFC 200 heavyweight victory over Mark Hunt on July 9, the Ultimate Fighting Championship (UFC) says.