Manchester United are hoping to sign 26-year-old Danish midfielder Morten Hulman from Sporting, according to TEAMtalk.
England manager Ruben Amorim had already worked with the player in Portugal before moving to Old Trafford. Although Hulman's contract includes an €80m release clause, Manchester United believe it could be reduced given Amorim's relationship with his former employer.
The midfielder has made 12 appearances for the club in all competitions this season, scoring one goal. Transfermarkt values his market value at €50 million.