Chelsea are preparing to go into next season without someone who was a key figure at the club in recent years. Thiago Silva has left the club after the expiration of his contract, with him enjoying a really strong four year spell at Stamford Bridge. Replacing him will prove extremely difficult for a number of reasons, however they have started doing this with the free signing of Tosin Adarabioyo. The leadership element is an area a number of players who were already at the club will need to step up in. There is reportedly belief that Levi Colwill is being earmarked already as a potential futur…