Manchester United are preparing to make a formal offer for Newcastle United midfielder Sean Longstaff.

Toon have no desire to sell Longstaff, who is under contract until 2022.

However, ESPN claim United have hope the 21-year-old could be convinced about a move to Old Trafford.

The Red Devils have been in discussions with Newcastle but are yet to agree on a fee.

Longstaff made eight Premier League appearances for Rafael Benitez's side before a season-ending injury.