"Kobbie Mainoo [has] played in different positions," Ruben Amorim has told the media ahead of Manchester United's Premier League clash against Newcastle United. "He can do [Casemiro's] position. He can play if we play with three, he can play like we play in the last game [at Aston Villa]. The position of Mason Mount in that game, he can play there. "He [Mainoo] is going to be the future of Manchester United. That is my feeling. He just needs to wait for his chance.