Chris Sutton has said that Pep Guardiola made a big mistake by allowing Cole Palmer to leave Manchester City. During the previous summer transfer window, the Citizens sold the Englishman to Chelsea in a deal worth over £42m. With the winger now set to make a return to the Etihad Stadium this weekend when Mauricio Pochettino’s side travel up to take on City for their latest Premier League clash, one pundit has weighed in on the Manchester club’s decision to sell Palmer. Sutton says Guardiola made a mistake letting Palmer go Writing in his latest column for BBC Sport where he previewed all of th…