Novak Djokovic risks being frozen out of tennis as he chases a record 21st Grand Slam title, with rules on travelers who are unvaccinated against COVID-19 tightening in the third year of the pandemic and some tournaments reconsidering exemptions. 

The Serbian, who has not been vaccinated, was deported from Australia on Sunday ahead of the Australian Open after losing a court case to have the cancellation of his visa overturned. 

Under Australian law, Djokovic cannot get another visa for three years – denying him the chance to add to his nine titles at Melbourne Park – but the government has left the details ⇒

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