Roger Federer pokes fun at his age with hilarious dad joke

Roger Federer has poked fun at his advancing years with a joke at the Hopman Cup New Year's Eve ball.

The 36-year-old is in Perth with 20-year-old compatriot Belinda Bencic for the exhibition event, ahead of the Australian Open grand slam.

Having played at last year’s Hopman Cup together, the duo has been on another winning streak together.

At the New Year’s Eve ball, the tennis partners were asked to introduce each other, with Federer’s introduction of Benic leaving the crowd very amused.

Federer began with: "I'd like to introduce my partner…”

But he soon turned the slight misstep into a joke, finishing with: "She's so young... or I'm so old I could be her dad!"

The Swiss superstar, who has four young children (two sets of twins!) of his own with wife Mirka, had not even shared Bencic's name before he started laughing himself.

Benic then introduced the great man himself with: "And I'd like to introduce the ultimate quokka selfie king!”

"And grand slam champion and all of that, Roger Federer!"

On his first day in Australia, Federer shared a selfie with a quokka on Rottnest Island on his social media.