Mustafi got done for the W Ham goal and is as much to blame for anyone for the mess at the back, i'd much rather Holding or Mavropanos in there
I do wonder why we even bother having those players if someone like Mustafi can mess up every week and still get the nod - he's 26 now so if he can't defend i'd argue it's too late to coach him
I actually think Emery has more excuse for Xhaka, as his contract was renewed by Ivan et al in the summer so Emery probably feels he needs to at least give him a go before dropping him, but he's surely seen enough now...