“It is in your mind, yes, we have seen a few decisions this season,” Simpson, the Leicester right back, said. “It is something we have to learn to adapt to as players. They have changed the rules. The way it was last season, I thought we were very good at defending set pieces and we made it tough for the opponents.

“You have been doing that [grappling] all your career and suddenly you have got to change it, but it’s the same for everyone.

“It’s something we are going to have to adapt to and I am sure we will look at it and work out the best way because that can’t happen again. They have made it [the rules] very clear and we know the decisions that have been made, but in any game, whether it’s at Old Trafford or wherever, you can’t concede three goals in ten minutes from set pieces.”