The Red Devils have already completed four very important transfers.
Jose Mourinho has bought Eric Bailly from Villarreal, his old Inter Milan star striker Zlatan Ibrahimovic and ex-Borussia Dortmund ace Henrikh Mkhitaryan.
Many fans are hoping that the fourth major acquisition will be the Juventus midfielder.
But what if the Frenchman turns them down? Who should United target instead?
Check out the 10 candidates in our gallery above.