World number 1 Novak Djokovic boarded a flight to Belgrade from Dubai on Monday, after arriving there earlier in the day.
Djokovic had arrived in the United Arab Emirates after his deportation from Australia over its required Covid-19 vaccination ended his hopes of defending his Australian Open title.
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Had Djokovic won the Australian Open, he would have gone past Rafael Nadal and Roger Federer as the man with most Grand Slam titles. All 3 are currently tied at 20 titles each.