Jack Sock shows great sportsmanship during Hopman Cup

  • 8 years ago
US tennis player Jack Sock advises Australian opponent Lleyton Hewitt to challenge an umpire’s decision that a service shot was out. Hewitt took Sock’s advice and asked for a review, when the shot was found to be in by officials. Hewitt went on to win the match 7-5, 6-4
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