Speaking on Sky Sports after the game on Sunday, Roy Keane said: "Manchester United have made progress but at the end of the game, I'm looking at Luke Shaw still at left back — there are questions over him.
"Aaron Wan-Bissaka, Fred, Scott McTominay — it's like Man United haven't moved on from the problems in the past. I'm not blaming them as it was a tough game, give credit to Arsenal.
"It was a reality check. I still think Man United are well short. They were missing players today but a squad like Man United should be able to deal with it. You are looking at the bench and it wasn't great."
Man United suffered a disappointing 3–2 defeat away at Arsenal in the Premier League on Sunday, conceding a goal in the final minutes of the game.
Up next in the top flight for the Red Devils, who remain fourth in the table, is a game against Crystal Palace at Old Trafford on Wednesday, February 1.
