Ex-Manchester United striker, Teddy Sheringham, has backed new head coach Ruben Amorim to win three trophies this season. Amorim replaced Erik ten Hag at Old Trafford and flew into the UK on Monday. Sheringham is backing the 39-year-old to make an “immediate impact” with the Red Devils. He told FlashScore: “Ruben Amorim can make an immediate impact at Manchester United with a style of play that is on the front foot, taking the game to the opposition. “If the players start playing at 100% then you could see him landing a new contract very quickly. “Amorim could end up winning three trophies thi…