MELBOURNE, Australia (AP) No. 3-ranked Novak Djokovic advanced to the fourth round of the Australian Open after playing just one set against Serbian Davis Cup teammate Viktor Troicki on Friday.
The 2008 Australian Open champion had just won the first set 6-2 when Troicki retired due to a stomach problem.
Djokovic says ``it's not really the way you want to win - especially if you're playing against one of your best friends.''