The Australian former Wimbledon finalist tested positive for a metabolite of cocaine at a tournament in June.

It was perhaps a sign of how seriously the players were taking it that Sabalenka used her 60-second timeouts to dance the Macarena

The Serbian alleged in an interview that food he was served in Melbourne led to him having high levels of lead and mercury.

The outspoken Australian is set to make his comeback in Brisbane following knee and wrist surgeries.

Djokovic had to save four set points on his serve to avoid falling 2-1 down to home favourite Alexei Popyrin on Rod Laver Arena.