Novak Djokovic could not commit to extending his association with his coach Andy Murray following the Australian Open, but only has "positive" feedback for his former rival.

The 24-time grand slam winner named Murray, who was born one week before him in May 1987, as his coach back in November, ahead of the season's first major.

However, after Djokovic withdrew from his semi-final against Alexander Zverev at Melbourne Park due to injury, the future of the partnership seems to be up in the air.

"I don't know," Djokovic replied when asked if the arrangement with Murray would continue.

"You know, we both are disappointed with what just happened, so we didn't talk about the future steps. We are so fresh off the court."

Murray, a three-time major winner, retired from his playing career following the Olympics in Paris last year before the Scot took up the coaching role with the Serbian.

"I'll definitely have a chat with Andy, and thank him for being here with me," 37-year-old Djokovic said.

"You know, give him my feedback, which is, of course, positive, and see how he feels, and we take the next step.

"We are still hot-headed and disappointed, so it's kind of hard to switch the page and start talking about what the next steps are.

"You know, I think we both need to cool off a little bit and then we'll have a chat."

Djokovic had sustained a muscular injury during his quarter-final win against Carlos Alcaraz earlier in the week and had appeared on Rod Laver Arena for the semi-final with heavy strapping around his left leg.

After a first set that was won by Zverev 7-6 (7-5) in 81 minutes, Djokovic walked up to his opponent and shook his hand before confirming his withdrawal from the game.