Novak Djokovic still a doubt for Australian Open

Australian Open organisers still don't know if men's tennis number one Novak Djokovic will be playing at the event in Melbourne next month.

All players must be vaccinated against Covid-19 or have a medical exemption, but Djokovic is still refusing to declare his vaccination status.

Tournament director Craig Tiley say it'll be "disappointing" if Djokovic doesn't meet the criteria.