Chelsea are looking to sell goalkeeper, Djordje Petrovic, only one year on from his arrival at Stamford Bridge. The Blues signed the Serbia international from MLS last summer in a seal worth an initial £12.5million. Petrovic made his Premier League debut from the bench in December, replacing the injured Robert Sanchez. He remained first choice under Mauricio Pochettino for the remainder of the season, keeping five clean sheets in the process. The 24-year-old was left out of Enzo Maresca’s squad for the pre-season tour of the US due to a small injury and while he is expected to travel Stateside…