
Nick Kyrgios has cast friendship aside by defeating doubles partner Thanasi Kokkinakis for a spot in the second round on an emotional day at the US Open.
Kyrgios clinched the win in a tiebreaker to take a 6-3 6-4 7-6 (7-4) at Arthur Ashe Stadium on Tuesday Australian time, just a couple of hours after wild scenes greeted Serena Williams as she defied predictions win her opening march.