Ukrainian Marta Kostyuk's handshake refusal latest sign of tension at US Open
Victoria Azarenka defeated her 6-2 6-3 in the second round. The pair exchanged a quick tap of the racket on Court 17 after Kostyuk whacked the ball into the net on the third match point and the three-time Flushing Meadows finalist let out a triumphant roar. "Well, I wasn't surprised.