MANCHESTER UNITED are set to undergo huge change during the summer transfer window.Sporting striker Viktor Gyokeres is reportedly open to a reunion with Ruben Amorim at Man Utd, with the Swede likely to leave Portugal this summer.The Red Devils are interested in Bryan Mbuemo, with the Bees reportedly waiting for a fee of around £70 million for one of their star players.Elsewhere, Chelsea remain interested in Alejandro Garnacho, and could sign him as a replacement for the outgoing Jadon Sancho.FOLLOW THE CLUB WORLD CUP ON DAZNFollow ALL of the latest news, rumours and updates from Old Trafford below…