Organisers of the Australian Open are under increasing pressure from players to tweak their frantic schedule, and avoid gruelling matches that end as late as 4am.
Andy Murray was beaten by Roberto Bautista Agut on Saturday evening in the third round of the tournament, a day and a half after a six hour long encounter which ended just after 4am.
Novak Djokovic has now joined calls for a scheduling change as concerns for player welfare grow.
Tennis correspondent Dave Worsley is Melbourne for the tournament.
He spoke to Morning Report.
