Nick Kyrgios crushed fellow Australian Alex de Minaur 6-2, 6-3 on Thursday to reach the quarter-finals of the ATP Montreal Masters.
Kyrgios carried on constant backchat with his player box, giving almost a running commentary of his state of mind on court in a display that seems second nature to him.
Nevertheless, the Wimbledon runner-up dominated in the all-Aussie match, winning the opening set at a clip of three minutes per game in a contest which took just 64 minutes.
The second-set pace was just as torrid, with Kyrgios breaking in the opening game.
He failed to serve out the win leading 5-2, missing on a drop shot and sending a forehand into the net.
But de Minaur lost the next game to love as Kyrgios prevailed in front of a packed-out stadium.
The winner of last week's Washington 500 series title stretched his runaway win streak, earning a 15th victory from his last 16 matches.
His lone loss in that span came to Novak Djokovic in the Wimbledon final.
© Agence France-Presse