The Mirror reports that United chief scout Jim Lawlor watched the youngster in action at the weekend.
United could decide to make a move for the 19-year-old defender before the transfer window closes on Friday.
United face competition from Premier League rivals Everton in the race to sign the defender.
Everton scout Alan Stubbs also watched the youngster in action at the weekend.
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The start of the 2017-18 Premier League season is just around the corner and is shaping up to be one of the most competitive yet.
As always it is the so called “big clubs” that have splashed the most cash in the transfer window so far this summer. Manchester United or City? Arsenal or Tottenham? Who are the winners and losers of the transfer window so far?