Anderlecht midfielder Youri Tielemans is high on the shopping list of Premier League giants.
The Mirror says United are one of six clubs apparently interested in Tielemans.
Louis van Gaal was keen on the Belgian but a deal could not be done, and United are taking another look at the 19-year-old who already has 119 league appearances.
However, Jose Mourinho would face competition from Bayern Munich, Liverpool, Arsenal, Chelsea and Tottenham to secure his signature.