Djokovic’s father, Srdjan Djokovic, said his son had been held in a room guarded by police at the airport. “This is not just a fight for Novak, but a fight for the whole world,” he said in a statement released to the media.
President Aleksandar Vucic said the star was a victim of “harassment” and said that “the whole of Serbia” supported him.
Mr Morrison denied the visa cancellation was because of “any particular position in relation to Serbia”, describing the nation as “a good friend of Australia”.
Australia is seeing tens of thousands of Covid-19 cases for the first time after enduring some of the world’s strictest restrictions. More than 90% of Australia’s over-16 population is fully vaccinated, but some people still cannot travel interstate or globally because of current measures.
Many Australians had previously accused the government of allowing the rich and famous to do as they please while ordinary people remained separated from sick and dying loved ones.
News of Djokovic’s exemption triggered an overwhelmingly angry response in Australia.
Former Australian Open tournament director Paul McNamee told local media the visa U-turn was unprecedented, saying it “smells” of politics.
The Australian Open begins on 17 January in Melbourne. Djokovic has previously won the tournament nine times.