Herrera was booked for his first foul on Saturday... it wasn't any worse than several fouls that preceded it in the game, and not as bad as some. After that, he gave a very controlled performance. He was actually fouled quite a few times in the game, and used it to his advantage. He didn't dive, he didn't run to the ref every time there was a foul, there was no waiving of imaginary cards... What he did was help win the midfield battle, and allow Pogba to go forward. City's players were wound up because he was frustrating their attempts to get back in the game, not because he was playing unfairly, or trying to deceive the referee. I don't know what people want from him, or what they think they're going to get from some shiny new replacement. He was immense on Saturday, let's hope he can carry this form on and stay fit.