Nick Kyrgios doesn't mind battles, and it rarely matters to him if it comes on the court or perhaps off the court on social media.
He had his latest one on social media with a fan who questioned his on-court mentality and level of commitment to tennis. It's a fairly popular criticism of Kyrgios, yet it's one that has been more true in the previous years of his career and not so much this year. You certainly don't reach the Wimbledon final by chance.
Kyrgios responded to the fan:
"I don't think you'd win a point off me and to be honest, I think concentrating on your life is probably a better idea."
The Australian is set to make his comeback at the Tokyo event next week.