Gunners youngster who impressed so much in pre-season continued to push for a place in the first team in style before team-mate Josh Dasilva scored another one
The 17-year-old netted a beautiful effort from the corner of the penalty area that flew straight into the top corner of Kieran O’Hara’s goal.
Manchester United Under-23 keeper Kieran O’Hara could do nothing about Reiss Nelson’s strike
Reiss Nelson strikes a beautiful free kick for the Gunners
Then Josh Dasilva scored an equally impressive effort from the opposite side to give the Gunners a 2-0 lead at Leigh Sports Village.
Arsenal had won two and lost one before the game, while United had won one, drawn one and lost one.
Luke Shaw started for United, but was unable to turn the game in the Red Devils’ favour.
The England international had been criticised in a big way by Jose Mourinho last season, as the Portuguese questioned his attitude towards overcoming injury.
James Wilson, Demetri Mitchell and Scott McTominay also started, but they were unable to overcome their North London opponents.
Arsenal moved the ball with purpose at the multi-use stadium and once they were 2-0 up they had the wind in their sails.
United did their valiant best to get back into the game, with Wilson looking a threat, but looked to pick up a hip injury late on.
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Reiss Nelson celebrates scoring a free kick for Arsenal Under-23s against Manchester United
And Reiss Nelson’s strike flew straight into Kieran O’Hara’s goal
Scott McTominay also got game time for Manchester United but could not influence the result in the Red Devils’ favour
Wilson, 21, has been out since October after picking up a nasty knee injury while on loan at Derby last term.
But he looked to aggravate his hip after reaching to meet a cross at the near post.
McTominay was booked late on as the home side showed frustration at their lack of influence on the game.
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Arsenal teen Reiss Nelson has got skills