Novak Djokovic often has to cup his ear to encourage a crowd to cheer for him.
He has won a record-equalling 20 men's Grand Slam titles and is a world number one with jaw-dropping athleticism - but he is also one of his sport's most polarising figures.
The 34-year-old Serb is currently sitting in a government detention hotel in Australia, waiting for his latest controversy to play out after having his visa revoked in Melbourne when he arrived to defend his Australian Open title.
A court will decide on Monday whether to deport him - but whether he wins or loses his appeal, this week's events have made him an even more divisive player.