The defence played well on Thursday night, with Besiktas restricted to only a few chances. The second goal was the midfield's fault, and the first, it could be argued, was due to a lack of communication, which with a settled defence would hopefully improve. I don't see anyone on the bench who has demonstrated they would improve the backline that started on Thursday. Mingueza, in particular, has looked way off PL quality so far (surprising given his pedegree). Canvot is easily our quickest centre-back, and Khalaili has been one of our biggest attacking outlets. Both do need to focus on doing the simple stuff well, but for me I wouldn't change things, unless Tomiyashu has recovered (he's the only one who looks like improving our backline). It's all opnions, though, innit.