Novak Djokovic retired from the Australian Open semi-final to a chorus of boos from sections of the Rod Laver Arena crowd as opponent Alexander Zverev called for “respect” to be shown to the 10-time champion.
Djokovic immediately shook hands with Zverev upon losing the first-set tiebreak after struggling with a torn muscle in his upper left leg, sustained in his quarter-final comeback over third seed Carlos Alcaraz on Tuesday.
