Ros Atkins On... Novak Djokovic and Australia

Tennis star Novak Djokovic has had his visa to enter Australia dramatically revoked on his arrival in Melbourne.

It comes a day after he was granted an exemption from vaccination rules to play in the Australian Open.

The BBC's Ros Atkins looks back at how things got to this point.

More on this story: Australia cancels visa of tennis No.1 Djokovic