Chelsea players are beginning to filter back in to the club as they prepare for the upcoming pre-season campaign. New manager Enzo Maresca will be leading his side on another tour of the United States, and will be hoping for a similar start to life that Mauricio Pochettino enjoyed this time last year. The Argentine was sacked after just one season at the club, despite leading the club to a place in Europe next season. He also had to deal with a plethora of injury problems to many key first team players. One of those who was affected the worst was Wesley Fofana, who suffered a serious knee inju…