Diogo Dalot spent a season-long loan at the San Siro under the management of Italian technician Stefano Pioli. The Portuguese player enjoyed an overall good season as he played plenty of minutes as backup to both Theo Hernandez as well as Davide Calabria on the left and right sides of the field.
It is no secret that Milan management is convinced of the player's abilities, believing that he will turn into a better player in the future. That is why they are keen to keep him after the loan expired.
According to what is reported by Tuttosport, Manchester United, the owner of Dalot's card is not opening up to let go of their talented player on loan with option to buy. It appears that they would prefer a permanent sale to bring in cash immediately.