South Korean tennis star Chung Hyeon made tough work of it,... but he has advanced to the second round of the Australian Open.<br />The world number 25 is back in Melbourne for the first time since his incredible run to the semifinal last year.<br />It was a hard fought first round match against American Bradley Klahn,... but Chung came from two sets down to win three sets to two.<br />Twenty-two-year-old Chung will face 53rd ranked Pierre-Hugues Herbert of France in the second round on Thursday. <br />
