Even if Cahill has a shit game, no one will say anything about him because he's English. Seriously, the type of posts I read on this forum about Luiz, it's like he's the new Titus Bramble or something. I'm not saying that Luiz doesn't make costly errors, cause at times, he's like a headless chicken but why is that he plays worse with Cahill? I reckon a strong disciplined defensive coach like Clarke or Mourinho would make Luiz a solid defender. So maybe it's better for him, if he leaves Chelsea.