Manchester United are interested in West Ham defender Issa Diop.

Sky Sports says United are interested in signing Diop and willing to pay £45m plus a player for the West Ham defender.

West Ham are adamant that Diop is not for sale and it is believed they would not even listen to offers of less than £60m.

Diop played 38 times last season after the Hammers signed him from Toulouse a year ago for £22m.

Former United manager Jose Mourinho singled out Diop for praise when his side lost 3-1 at West Ham in September last year.