But international football is different to the Premier League.
Plus, it's not even just about having a fast CB beside Silva. It's also about whether Tuchel can still play the pressing game effectively for example. Can we still press high effectively with Silva in a back 4 and when he's more exposed compared to a back 3?
Just like those 3 other players you mentioned, Silva's best work for us has come in a back 3. Big question mark over him in a back 4 with us.