World number one Novak Djokovic has withdrawn from the ATP Cup in Sydney amid ongoing uncertainty over his title defence at next month’s Australian Open.
Djokovic has not yet confirmed his place at January’s Grand Slam due to the COVID-19 mandate in Victoria.
The 34-year-old’s father, Srdjan, has previously said that the nine-time Australian Open champion is unlikely to feature in Melbourne unless vaccination rules are relaxed.
World number 33 Dusan Lajovic will now lead the Serbia team at the ATP Cup.
Meanwhile, Austria have been replaced by France at the event following the withdrawals of Dominic Thiem and Dennis Novak. The French will be led by world number 35 Ugo Humbert, alongside Arthur Rinderknech, Edouard Roger-Vasselin and Fabrice Martin.
Russia’s Andrey Rublev, Aslan Karatsev and Evgeny Donskoy have withdrawn, with Evgeny Karlovskiy joining the team, while Team USA’s Austin Krajicek has also pulled out.
The ATP Cup will begin on New Year’s Day at both Ken Rosewall Arena and Qudos Bank Arena, Sydney Olympic Park.