Paul Pogba's world record £100million move is being held up by a row over his agent’s £25m fee, the Sun has reported.
Recent reports have claimed that Manchester United and Juventus have already reached an agreement for the transfer of the midfielder.
He is expected to become Jose Mourinho's fourth summer signing at Old Trafford.
Last week, Juventus coach Massimiliano Allegri confirmed that negotiations are underway to finalise the transfer of the Frenchman.
"Pogba is a Juventus player at the moment but we don't know what is going to happen," Allegri told reporters.
"The club are looking after negotiations.
"Marko Pjaca is another quality addition for us so whatever happens with Pogba, we will be in good shape."