Chelsea players have begun filtering back in to Cobham as they begin preparations for the upcoming domestic season. The Blues endured their first training session under new manager Enzo Maresca yesterday, with a video emerging of the Italian beginning to get his instructions across to his new players. The session was an opportunity for a number of players who have been suffering with injury to begin to make their return. Wesley Fofana was one of those seen amongst his teammates at Cobham. One experienced player that Maresca will have to work around not having at the club is Thiago Silva, after…