Manchester United lost 0-1 to Everton at Old Trafford in the Premier League on Monday evening.
A first-half strike from Kiernan Dewsbury-Hall was enough for the Toffees to register a massive win at the famous stadium.
Everton were reduced to 10 men for nearly 80 minutes after Idrissa Gueye was sent off for slapping teammate Michael Keane.
The Toffees impressed with their resilient defending, helping David Moyes claim a famous victory.
United head coach Ruben Amorim admitted that he is concerned about how his team approached the game.
He said to BBC Sport: “Does it feel like a step back? “Yes. Especially in the way we played the game.
“Forget the result. The result is really bad but I was more concerned by the feeling I had during the game.
“Everyone should play better today.”
The Red Devils lacked the creativity to carve out chances when Everton decided to sit deep and soak up pressure.
The Toffees would have been happy even with a point but United had the onus to net twice.
Bruno Fernandes tested Jordan Pickford with a couple of long-range efforts.
Joshua Zirkzee had multiple chances late in the game but his headers failed to find the back of the net.
Amad Diallo looked lively but lacked the cutting edge.
Patrick Dorgu and Diogo Dalot were abysmal in the left wing-back spot, a major worry for Amorim.
Everton looked more determined to win the three points, which is a damning but accurate summary of the clash.
United had taken two steps forward during their recent five-match unbeaten run, but this defeat looks like a major step backwards, as the manager himself mentioned.