Ander Herrera has hit back at ref Michael Oliver for handing him a yellow card for diving in the Manchester derby - and claimed it should be rescinded.
Herrera was cautioned in the 79th-minute of United's 2-1 defeat to local rivals City at Old Trafford after going down under a challenge from Nicolas Otamendi.
The United midfielder, along with boss Jose Mourinho, was livid his side were not awarded a spot-kick and made clear his sense of frustration after the game.
"I think the penalty is amazing," said Herrera. "He didn't expect to arrive for the ball. I touched the ball first and he stamped on my foot. I think everyone saw it.
"Everyone can make mistakes too, also the referee, I didn't deserve the yellow card.
"In the first-half the same situations with Gabriel Jesus and Sane and they didn't get yellow cards.
"Now that is my fourth yellow card and that's a big problem for me because I want to play every game.
"In Spain, if you get something undeserved, you can appeal and they take it out.
"That's one of the things that could improve the Premier League, because it's an amazing thing, an amazing competition.
"In my opinion, the organisation is the best in the world, but it's a real shame that if you don't deserve a yellow card you cannot appeal afterwards.
"Hopefully one day that rule can change."
Herrera claimed United were unlucky to lose and controlled the game, despite City having 65 per cent of possession over the 90 minutes.
Echoing Mourinho, who branded City "lucky", Herrera said: "It's hard to lose the way we did, because we lost with two unlucky goals.
"Apart from that, I don't think they created too much, just I think in the first-half one good action by Gabriel Jesus, and he shot at David [De Gea's] hands.
"After that I think we controlled the game. It's true we played most of the time in our half, but we didn't have too many problems.
"It's a real pity to lose the way we did. It was very unlucky. the first goal the rebound went to David Silva and the second Romelu [Lukaku's] clearance kicked the back of Chris [Smalling].
"It's very disappointing to lose the way did. The only thing we can think now is we're still second and we want to keep chasing them. I know it is difficult, but we want to keep winning games and now beating Bournemouth on Wednesday is all we can do."