You would have to assume in those situations it would be Walker defending with Jorginho helping out. The difference with Pep is he's all about positioning. 5 attacking and 5 defending. Mancini had Italy all over the place.
I don't know. They should have been much better able to deal with the attack. He was unable to offer the defender any help. Beaten badly for pace and then just tries to throw himself ala Otamendi. Walker frequently goes wandering up the pitch leaving the right-hand side exposed. He'll probably be pretty good when we're in possession, which is most of every game that we play. It's just in those tough games, particularly against teams that counter quickly, where he may struggle. A lot is made of how he might improve us against Liverpool when in possession, but how about when we don't have possession? Liverpool have so many quick players that you need your CDM to seriously contribute in stopping the attacks. It is conceivable that next season they could go forward with Salah, Mane, Firminho, Keita, Fekir and Chamberlain. Given that we play with both De Bruyne and Silva, neither of which is strong defensively, we should be bringing in someone with a bit of pace and a physical presence who can defend competently.