Despite a bright start from United, which saw Ole Gunnar Solskjaer's side get in behind the Gunners' defence on a number of occasions, it was the hosts that emerged victorious, courtesy of first-half strikes from Nicolas Pepe and Sokratis Papastathopoulos.
“We started the game well,” Harry said to MUTV after the game. “In the first 10 minutes we created two good opportunities where we should have been a little bit more clinical. And then from there until the half-time whistle they were on top.
“They played with more aggression, more intensity and they pressed us better.