Djokovic withdrew from the ATP Cup in Sydney last week and has not yet arrived in Melbourne for the first grand slam of the year.

Players must be vaccinated or have a medical exemption in order to play in the opening Major of 2022 and Djokovic has refused to disclose whether he has been jabbed.

Tiley is unsure whether the world No.1 will go in search of a record 21st grand slam title at the Australian Open, which starts on 17 January.

"We've still got a few charter flights coming in until the end of this week and then all the players will be here," he said.

"As far as the status relates to Novak, I think we'll have a much clearer picture in the coming days otherwise it's getting pretty late to show up and play the Australian Open."

He added: "There's quite a bit to play out and I think it will play out in the coming days."

Djokovic has won the Australian Open men's singles title a record nine times and beat Daniil Medvedev in the 2021 final.