Roy Keane admitted that Manchester United players poked fun at one former teammate over how his performance ‘sealed the deal’ for the club’s acquisition of Cristiano Ronaldo. Former United manager Sir Alex Ferguson brought club legend Ronaldo to Old Trafford in 2003 as part of a £12.24m deal with Portuguese side Sporting CP. Ronaldo, who also caught the eye of Arsenal legend Arsene Wenger at the time, wowed United and Ferguson with an impressive performance against the Red Devils. The five-time Ballon d’Or winner put in an inspirational display during the friendly clash against United, with Ro…