Herrera is in his first season at United.
He told the Telegraph: "I was surprised when we had to wait 30 minutes for the game with Cambridge to start because their fans were delayed. That was fantastic. In Spain games can be 11pm, sometimes on Monday. It's not normal for kids. Kids have to go to school. In England, fans are put first. In Spain, fans are not put first. I hope it can be better in the next years.
"The organisation in England is very, very good. Even the FA Cup is fantastic. You play against everyone! It's an open draw. You can play Cambridge away, Cambridge at home. It's very exciting for everyone. In Spain, if you are a lower team you can win one (first-leg) game against Real Madrid but you then have to play in Bernabeu in Copa del Rey. It's not so exciting like in England."