Mourinho claimed the Spanish striker tried to get Nemanja Matic sent off by feigning injury in the first half of the 1-0 win at The Etihad on Monday.
And Mourinho said it was time for players to be punished for simulation.
"In the game of Man City, I had an exchange of words with one of the City players," he said.
"I was not happy because he was trying to get Matic sent off. He knew he had a yellow card.
"Matic jumped just in front of me in a very clean way, and the other guy immediately [holds his face]. He knew Matic had a yellow card already.
"Mike Dean, the fourth official and the linesman were all there, and they decided between them no yellow card.
"But if no yellow card for Matic, then for me yellow card for the other guy. He deserves the punishment if he's trying to get the guy sent off."