Tennis star Naomi Osaka feels she has a bit of the stubbornness like the Japanese ninja character, Naruto, a popular anime series she watched as a kid.

Talking about the series, she told Highsnobiety website: "Just watching as an outsider and seeing all the work that he put in, was really cool when I was younger. He was the outcast, and then he proved himself to people, and we started believing in him. That stubbornness is something maybe I have a little bit."