Djokovic remains quiet on vaccination

World number one Novak Djokovic once again declined to reveal whether he has been vaccinated against Covid-19 and said he was unsure if he would defend his title at next year's Australian Open.

The state of Victoria, where the Grand Slam event takes place in Melbourne, has introduced a vaccine mandate for professional athletes, although authorities have not yet clarified what the requirement will be for those coming from abroad.

"Things beings as they are, I still don't know if I will go to Melbourne, Djokovic said.

"I will not reveal my status whether I have been vaccinated or not, it is a private matter and an inappropriate inquiry.

Djokovic has won the season's opening Grand Slam a record nine times, including the last three editions.

The 34-year-old last competed at the U.S. Open, where his bid to complete the calendar slam -- winning all four majors in the same year -- was ended by Russian Daniil Medvedev in the final.