Kyrgios scored a convincing 6-3 6-4 win over the American, hitting 16 aces in the late night thriller. The former World No.13 was again impeccable on serve, winning 84% of points behind his first serve. Furthermore, he saved all four break points faced in the one hour and 25 minute encounter.
Paul never stood much of a chance, as he was unable to match the firepower coming from the Australian's racket. The World No.4 failed to capitalize on any of his break point opportunities, which were quickly extinguished by the sublime serving of his volatile opponent.
Kyrgios has been in great form over the last few weeks, finishing runner-up at the Wimbledon Championships. Additionally, the Cranberra native won the doubles event last week's Atlanta Open, teaming up with compatriot Thanasi Kokkinakis.
Awaiting Kyrgios in the round of 16 is big-serving American Reilly Opelka, who leads 2-0 in career meetings against the Aussie.