A-League tensions boilover for Roar It couldn't get any worse for the Brisbane Roar - or so they thought. Former Socceroos gloveman Mark Bosnich has slammed Roar veteran Shane Stefanutto for taking rookie goalkeeper Jamie Young to task after the defending A-League champions earned an unwanted slice of history on Saturday night. Brisbane's title defence is officially in tatters after they succumbed 3-1 to Melbourne City at Suncorp Stadium, becoming the first A-League team to lose their first four games of the season. And there were ugly post-match scenes as Stefanutto and teammate Young had to be separated as they left the field. Veteran defender Stefanutto singled out Young in full view of fans after the English 'keeper had conceded a total of 10 goals in his four games to date. Twice the pair had to be separated by teammates and officials as they left Suncorp Stadium. Much to Bosnich's disgust. "Shane Stefanutto is part of the leadership group," he told Fox Sports. I can't believe it to be honest that he is dealing that to a goalkeeper who is just coming onto the scene. We know Jamie Young has had a tough time but there is no need for him (Stefanutto) as a senior player to be doing that on the pitch in front of everyone. That just exacerbates the problem. It just shows the 17,000-strong crowd that it is not a happy camp. He (Roar coach Mike Mulvey) needs to address these issues because there is something that is not 100 per cent right. Mulvey seemed alarmed when told of his players' post-match behaviour. "I would have to see it and talk to the players before commenting on it," he said. Young is filling in for first choice keeper Michael Theo who is still a month away from returning from a fractured wrist. Adding salt to the Roar's wound, City nothed just their 11th win in 59 away matches since they joined the competition as Melbourne Heart in 2010. Mulvey all but admitted his champion side had to go back to the drawing board ahead of their November 14 away clash with Newcastle. "We need to find some answers," he said. We need to have a good think and a bit of a rethink as well. Because clearly what we're doing is not bringing the results we desire.