While I agree a better back 4 always helps many of the goals he conceded were avoidable. Further his distribution from the back has become worse and he generally seems nervy in high pressure environments which is the last thing you want.Probably in part because the team has been playing with its backup fullbacks for 2 months and it's starting CBs are worse than Luiz and Mustafi were. He's been poor since his injury yes and he was absolutely horrific against Newcastle but it's not like he's been leaking in Karius level goals. He's been letting in high percentage chances that are being gifted by a shaky defense. There's very few keepers about who would have saved most of what he's let in, that's just reality. Give him the City or Liverpool back 4 and he'd have more clean sheets.