Towel Tug-of-War Sparks Wimbledon ControversyU.S. tennis star Jack Sock is using Twitter to find the teen who lost out to an older fan in the battle for a Wimbledon memento.Towel Tug-of-War Sparks Wimbledon Controversy00:52Link copiedJuly 5, 2017, 8:41 PM UTC / Updated July 5, 2017, 8:41 PM UTC