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Video - Zou wins China boxing gold
Zou Shiming helped China to its first ever Olympic boxing gold with victory over Mongolia's Serdamba Purevdorj who was forced to retire with an injury.
The Chinese light flyweight, 27, picked up a point in a cagey first round against an opponent who was choosing to keep his right glove low down.
It transpired there was a problem with his right side and after 19 seconds of the second round Purevdorj quit.
Zou, the double world champion, has now added gold to his Athens bronze.