Manchester United legend Roy Keane has admitted that he would have been “ashamed” if he did one thing during his time as a manager. Considered one of the best captains of all time, Roy Keane excelled during his time at Manchester United and left behind a long-lasting legacy at Old Trafford. The Irish hardman was widely revered for his leadership skills and hard work ethic, with Keane emerging as a key figure at United under Sir Alex Ferguson. Keane took over as United captain after Eric Cantona’s sudden retirement and the Sky Sports pundit is thought of highly by his ex-teammates during his ru…