It was the kick in the guts that crippled Nick Kyrgios's Australian Open campaign, and now it's ruled him out of the Davis Cup team.

Kyrgios doesn’t owe anyone anything. His talent is his, and he can do whatever he wants with it — it’s not for us to decide ...

Everything that Jannik Sinner means to the summit of men's tennis could be temporarily wiped away in just a few months.

Analysis - It's local supporters at the Australian Open who have been the worst behaved, with actions like booing Novak ...