7 things about giant-killing South Korean tennis star Chung Hyeon

Chung Hyeon celebrates after a point against Novak Djokovic during their men's singles fourth round match on day eight of the Australian Open tennis tournament in Melbourne on Jan 22, 2018.
Chung Hyeon celebrates after a point against Novak Djokovic during their men's singles fourth round match on day eight of the Australian Open tennis tournament in Melbourne on Jan 22, 2018.PHOTO: AFP
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20 min ago