Nick Kyrgios has cast friendship aside to cruise into the US Open second round with a straight sets dispatch of his grand slam-winning doubles partner Thanasi Kokkinakis.
Kyrgios broke Kokkinakis in each of the first two sets, then clinched the win in a tiebreaker to take bragging rights in the all-Australian affair 6-3 6-4 7-6 (7-4) at Arthur Ashe Stadium on Monday night (Tuesday AEST).
