Liverpool boss Jurgen Klopp says blue cards would've made their win against Burnley a mess.
Klopp was booked during the game.
He later said: "It was emotional, definitely. Imagine in this game and the referee has a blue card available? It would have been the wild west.
"There were so many yellow cards today. I had no clue why Vincent Kompany got it.
"I lost it in that situation so fine, give me a yellow card. As long as I don't get a blue one and have to sit somewhere for 10 minutes!"