Kobbie Mainoo scored a late winner as hosts Manchester United clinched a 3-2 Premier League victory over Liverpool on Sunday to seal their return to the Champions League next season following two years away. After costly United mistakes allowed Dominik Szoboszlai and Cody Gakpo to haul Liverpool level in the second half, Mainoo had other ideas and struck from the edge of the 18-yard box in the 77th minute for a goal that rocked Old Trafford. That victory took United on to 64