The parents of Novak Djokovic claim their son is being held in a "prison"-like detention hotel in Australia.
The world tennis number one will have to wait until Monday to find out if his appeal against a rejected visa application will be successful.
But his rival, Rafael Nadal, says had Djokovic been vaccinated against coronavirus ahead of the Australian Open, there would be no issue.
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The Serbian's mother, Dijana, has been speaking to him.
