Novak Djokovic retired from an exhibition game in Adelaide due to an injury just a few hours after leaving the hotel quarantine.
Djokovic, the number 1 in the world, was supposed to play Jannik Sinner, but was replaced by Filip Krajinovic in the exhibition series .
Rafael Nadal will play Dominic Thiem and Ashleigh Barty will play Simona Halep from tonight.
Ref: https://www.theage.com.au