AUSTRALIAN OPEN 2023: Unvaccinated Djokovic back, year later


              FILE - Serbia's Novak Djokovic poses with his trophy after defeating Norway's Casper Ruud in the singles final tennis match to win the ATP World Tour Finals in Turin, Italy, Sunday, Nov. 20, 2022. Djokovic had just wrapped up last season by winning the ATP Finals for a record sixth time when, rather than looking ahead to 2023, his mind immediately went back to the way 2022 began: He was unable to compete in last year's Australian Open after being deported from the country because he was not vaccinated against COVID-19.(AP Photo/Antonio Calanni, File)
            
              FILE - 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. Djokovic will be back in action at the Australian Open when the 2023 Grand Slam season begins next week. He was not able to play in the tournament he's won nine times a year ago because he was not vaccinated against COVID-19 and was deported from the country. (AP Photo/Mark Baker, File)
            
              FILE - Rafael Nadal, of Spain, celebrates his win over Daniil Medvedev, of Russia, in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Jan. 31, 2022. Nadal is the defending men's champion at Melbourne Park and owner of a men's-record 22 major championships.(AP Photo/Hamish Blair, File)
            
              FILE - Serbia's Novak Djokovic hits a backhand return to Germany's Alexander Zverev during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021. Djokovic will be back in action at the Australian Open when the 2023 Grand Slam season begins next week. (AP Photo/Hamish Blair, File)