Celtic goalkeeper Joe Hart has been the topic of much discussion over the last few days following his announcement that he will retire at the end of the campaign. The 36-year-old has decided to call time on a fantastic career, which has seen messages of congratulations from famous faces such as Raheem Sterling, Kasper Schmeichel and Gael Clichy. Explaining his decision to hang up the gloves, Hart has disclosed that he wants to end on a high note rather than play on and be a victim of age-based decline He stated: “I really do feel like come gameday, I really do peak. But I’m aware that time wai…