Australia endured strict lockdown regulations, with an average of 6,000 travel applications rejected per month in the first 14 months of the pandemic. Similarly, Novak Djokavic was deported from Australia on 16 January 2022, after being detained by Border Force officials for failing to qualify for a vaccine exemption. He will not be able to play for his 21st Grand Slam title at the Australian Open.
Source: one, two, three