Goalkeeper is one of the most crucial positions in a team, and that is why they really need a very good and talented goalkeeper that can suit the team and do the needful for them because, seriously, Chelsea is not supposed to have a weak position at this stage of the competition; they need to make everything go smooth so it will not affect their position in the standings.
Enzo Maresca is a talented coach, and I believe he knows what to do to make everything go well for the team, so let's see what he will do and how he will solve the team problem. Sanchez tried his best, but I think he didn’t meet up with the manager's expectations.
Kepa Arrizabalaga is the most expensive goalkeeper at the moment, but does not contribute well, and tends not to be comparable to his value, because that Chelsea want to sell him and looking for a new goal keeper. Kepa Arrizabalaga look good on Bournemouth, but not suitable with Enzo, he want Mike Maignan as main goal keeper for Chelsea, but I think it's not easy, because another club also want his service. With 40 million euro I think that price is worth for Chelsea which have a problem with defender. But, the Chelsea problem is not goal keeper only, they have problem with attacker also which I think it's very crucial and need a new improvement to development that side.