Where did it go wrong for Rado Vidosic at Brisbane Roar?

Brisbane Roar are the defending champions of the A-League, yet they sit ninth on the table, one point above cellar dwellers Sydney FC. Now Rado Vidosic has been replaced as head coach by Mike Mulvey, who has only ever been in charge of four A-League matches. It’s an astonishing turnaround for a side that was the pinnacle of the competition for two consecutive years, so what has gone wrong this season for the Roar?