By James Cormack The brief Ruud van Nistelrooy era draws to a close at Manchester United on Sunday as the Red Devils take on Leicester in the Premier League. The Dutchman’s interim spell in charge began with a convincing win over the Foxes in the Carabao Cup, and the club’s former marksman has since overseen a draw with Chelsea and triumph over PAOK in the Europa League. Amad Diallo scored a brace in Thursday’s 2-0 win as United secured their first win of the league phase. The point recorded against the Blues last Sunday did little to help United’s Premier League standing, and it’s unlikely th…