By Jack Gallagher Declan Rice has hailed the performances of recent England debutant Kobbie Mainoo, labelling the youngster “really, really impressive”. The young midfielder has become one of the most talked about players in Europe since breaking into the Manchester United first team, instantly becoming one of the club’s most important players under the guidance of manager Erik ten Hag. Despite being just 18 years old, Mainoo’s performances have been so eye-catching that he earned his maiden senior England cap this past weekend, coming off the bench in the Three Lions’ 1-0 defeat to Brazil in …