I don't think Chelsea's defense is as bad as they say, it's just that their performance is very unstable. This team needs a coach who is truly respected by the players, like Tuchel or Jose Mourinho in the past, but now many players feel confused because they often get a different coach every new season.
This is more than just rotation of different coaches from the fact that these defense, the CB to be precise got injured and then was sideline for long came back a shadow of themselves though Fofana is gradually coming back to his best while player like B. Badiashile is fat from it.
This is the reason Chilwell has lost his place I'm the team remember how fearsome he was when he first arrived before all his injuries woes brought him down.
Chelsea and its management have big ambitions to rise and become the most competitive team in the Premier League again, but unfortunately their efforts so far can almost certainly be said to have failed miserably. A lot of money has been invested in players, but in fact their performance is very far from what is expected.
Todd Boehly spent without proper consideration and he is still doing same thing buying academy players from huge fee and then now most is still loaned out while others if they will be sold won't be up to what was use on them this is disappointing. While the likes of Enzo, Caicedo and Mudryk fee was a bad bargain I think there might be hope for them becoming a better player in the end until then Chelsea likely we continue to struggle
The previous match against Wolves was good, of course because Chelsea seemed possessed by scoring 6 goals for a 2-6 win. But I believe that such performance cannot be sustained.
Sadly this is a sad truth about Chelsea's, I don't have high hopes on the defense and Sanchez, I don't really expect much good from them except they improve from the fact that the defense are not usually aware of the opposition team players that are un their box and then a give much free space for them to capitalise on their flaws.