Novak Djokovic on Wednesday admitted "errors" in his travel papers and in his behaviour after a claimed coronavirus infection as he battled to stay in Australia and fight for a record 21st Grand Slam.
The world number one said his team had offered fresh information to the Australian government, which is pondering whether to cancel his visa, again, and throw him out of the country.
"We are living in challenging times in a global pandemic and sometimes these mistakes can occur," the unvaccinated 34-year-old said in a statement released as he practiced on the courts of the Australian Open, which starts Monday.
The Serbian star flew into Melbourne a week ago claiming a vaccine exemption because of a positive PCR test result on December 16.
Border agents rejected his exemption saying a recent infection did not qualify, tore up his visa and placed him in a detention centre.
But the vaccine-sceptic Djokovic's high-powered legal team dramatically overturned the visa decision in court on Monday on a procedural matter related to his airport interview.
Now, Immigration Minister Alex Hawke says he is considering cancelling the visa another time, as fresh doubts emerge.
Djokovic, a nine-time Australian Open champion, described reports about his post-infection outings in Serbia as "misinformation".
On the day after his positive test in Serbia, Djokovic appeared at a youth tennis event and at a ceremony to honour him with stamps bearing his image, both apparently without a mask.
Djokovic, who made no mention of the stamp ceremony, said he only received the PCR test result after attending the children's tennis event.