Justin Marshall: All Blacks and Springboks 'flex their muscles', media beat-up on Sam Cane

81-test All Blacks halfback and Sky Sport rugby commentator Justin Marshall joins Martin Devlin on It's Only Sport, to further delve into the All Blacks' 41-12 victory over Argentina to open their Rugby Championship account. Justin was in commentary alongside Tony Johnson for Sky Sport and shares what impressed him most about the All Blacks. He also touches on the Springboks' 43-12 win over the Wallabies, the Sam Cane-pitch invader story, and more.