WATCH: Kyrgios' reaction to an insane Roger Federer shot is everything

WATCH—Federer and Kyrgios to compete in the 2018 Laver Cup, in Chicago:

NEW YORK—Nick Kyrgios has always admired Roger Federer, to the point that the enigmatic Aussie has played some of his best matches against the Swiss great.

But for all the respect Kyrgios has for Federer, he couldn't help but unleash his inner fan after this incredible get from the five-time US Open champion:

On the changeover, microphones picked up Kyrgios calling the winner "the greatest shot you've ever seen."

(In his post-match press conference, Kyrgios was asked about the shot. "It was unbelievable," he said with a smile. I’m probably going to post it on Instagram.")

Federer spoke about the shot, too, after closing out a 6-4, 6-1, 7-5 win that featured a close first set—Kyrgios had 0-40 in one return game—a blowout second and an entertaining third, which included the winner from six inches off the ground.

"It really only happens on a center court of this size," Federer told ESPN's Darren Cahill about the genesis of the shot. "The funny thing about this shot is, I didn’t think about it until I hit it. I actually didn't think I was going to get it."

But get it he did, and Federer moves on to the fourth round, where he'll face another Aussie, John Millman.

All in Federer's bottomless bag of tricks, right? Well...

"Definitely a bit of luck, good feet," mused Federer, "but I guess I deserve it because I went for it."

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