City sources described Herrera’s behaviour as “disrespectful and immature” but the Spaniard insisted there had been no intention to spit deliberately at the crest and that his actions were unintentional.

A United spokesperson said: “Ander has seen the footage of the incident and is mortified at any suggestion that his actions were deliberate. It was entirely accidental and there was no intent whatsoever.”

As Herrera and his teammates left the field at the break, United were 2-0 down, having been outplayed by Pep Guardiola's champions elect.

A second-half revival, sparked by Herrera setting up Paul Pogba for the first of his two goals, denied City the chance to mathematically secure the title against their city rivals with six Premier League matches to spare.

It is also understood United manager Jose Mourinho had a coin thrown in his direction towards the end of the game, which he picked up and handed to a ball boy.