Manchester United midfielder Ander Herrera has claimed that he "did not deserve" the yellow card that he picked up in his side's 2-1 defeat to Manchester City on Sunday.
Herrera went down in the second half after a challenge from City defender Nicolas Otamendi, who scored the winner at Old Trafford.
The Spaniard and United boss Jose Mourinho were visibly livid following referee Michael Oliver's decision to book Herrera instead of award a penalty, and the latter vented his anger after the game.
"I think the penalty is amazing," Herrera told reporters. "[Otamendi] didn't expect to arrive for the ball. I touched the ball first and he stamped on my foot. I think everyone saw it.
"I didn't deserve the yellow card. Now that is my fourth yellow card and that's a big problem for me because I want to play every game.
"In my opinion, the [Premier League] 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."
United are 11 points off the pace following the result, which extended City's top-flight winning run to 14 games.
