Ruben Amorim has faced some difficult decisions during his first 24 hours as Manchester United head coach. After leading Sporting Lisbon to a Sir Alex Ferguson-esque comeback in his final game, Ruben Amorim flew to England on Monday to begin life at Manchester United. Despite Ruud van Nistelrooy boasting the best win rate of any United manager in history, Amorim decided that there was no space for the Dutchman in his backroom staff. United announced on Monday that Van Nistelrooy was one of four departing coaches, with Erik ten Hag’s assistant Rene Hake also leaving the club. Amorim has brought…