Borussia Dortmund centre-back Manuel Akanji is reportedly continuing to reject contract offers from his German club, as Manchester United step up their interest in the Swiss.

Man United are expected to move for a new central defender during this summer's transfer window, with Eric Bailly, Phil Jones and Axel Tuanzebe potentially all leaving the club.

The Red Devils have been strongly linked with Akanji in recent weeks, with the 26-year-old enjoying another impressive season at BVB, making 29 appearances in all competitions.

The Switzerland international only has a contract with Dortmund until June 2023, and according to Bild, he is refusing to sign an extension with the Bundesliga club.

The report claims that the German side are now resigned to losing Akanji in the upcoming market, with a fee in the region of £25m likely to be enough to sign him.

Harry Maguire's form this season has been heavily criticised, while Raphael Varane has struggled with fitness problems since arriving from Real Madrid last summer.