The Australian Open isn't all about tennis, all of the time. Roger Federer, Rafael Nadal and Milos Raonic (along with Vasek Pospisil, Raven Klaasen and Rajeev Ram) took part in the 30 Second Knockout Challenge.

They were given 30 seconds to toss balls at a display of tennis ball cans. For athletes who are prided for their hand-eye coordination, they struggled in completing this challenge, to all of their dismay.

"It's kind of hard," Pospisil admitted.

"I'm so bad," Nadal lamented.

Federer had to walk away after being told he was not the best.

In the end, their competitive nature was on full display, along with the remaining cans.

Federer, Raonic and Nadal are all through to the quarterfinals, while Ram and Klaasen fell in the second round in doubles.