Roger Federer reveals the secret to his Grand Slam motivation
Roger Federer has revealed what keeps him motivated to win Grand Slams.
The Swiss star clinched his 20th major tournament win at the Australian Open last month.
Federer, 36, was pushed all the way by Marin Cilic in a thrilling five-set final.
But he came out on top as he has done so many times over the years.
The victory also lifted him even closer to catching world number one Rafael Nadal in the world rankings.
But after his latest success, Federer was asked what keeps him so hungry for success on the biggest stage.