Novak Djokovic (SRB) at practice at the 2021 Rolex Paris Masters at the Accor Arena in Paris, FRANCE, on OCTOBER 30, 2021.,Image: 640618889, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia

Champions League semifinal second leg soccer match between Real Madrid and Manchester City at the Santiago Bernabeu stadium in Madrid, Wednesday May 4, 2016.//MARCA_1513.0462/Credit:CHEMA REY/MARCA/SIPA/1605061401,Image: 283556962, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia

Serbian tennis player Novak Djokovic (L) and Serbian President Aleksandar Vucic pose for a photograph durig their meeting in Belgrade on February 3, 2022. The 34-year-old world number one was unable to play in the Australian Open after being deported over Covid-19 vaccination issues, despite initially receiving an exemption from officials based on an positive PCR test weeks ahead of the tournament.,Image: 658764373, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia

Defending men's champion Serbia's Novak Djokovic practices on Margaret Court Arena ahead of the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 13, 2022. AP Photo/Mark Baker)