Djokovic suffered his first defeat in Australia for six years as De Minaur put the hosts on course for a 2-0 win over Serbia in their United Cup quarter-final.

"I knew that probably, (I was) not going to be at 100% physically, emotionally, mentally game-wise in the opening week of a season. Neither did I expect that," Djokovic, who had to have treatment on the wrist for the second day running, told a press conference.

"I was not on my level but it was just one of these days where I didn't feel my best on the court, and (my) opponent played very well."

However, the record 10-time Australian Open winner appeared optimistic about overcoming the wrist issue ahead of the first Grand Slam of the season.

"I think I'll be okay, to be honest," he said.

"(The wrist injury) did have quite an impact, particularly on the forehand and serve. (But) I have plenty of time, I think enough time to get myself in the right shape for the Australian Open.

"The process is not strange to me. It's not unusual. I've been in this kind of situation so many times and I know what I need to do along with my team to get myself ready... I hope that I will not be injured this time around.

"That's what we're going to work on, to get my body in the right shape, optimal state, so that I can perform at the high level throughout hopefully the entire Australian Open."

The 2024 Australian Open will be played between January 14th and 28th.