MIKEL ARTETA was reportedly left with “blood pouring down his face” after the extraordinary bust-up in the Old Trafford tunnel.
And Manchester United striker Romelu Lukaku was said to have been “prominently involved” in the 20-man melee which saw punches thrown.
Jose Mourinho was allegedly hit on the head with water and milk as tensions boiled over following City’s 2-1 derby win.
The Etihad side later downplayed these reports but respected journalist Daniel Taylor claimed witnesses said former Arsenal ace Arteta was left bloodied from the shameful encounter.
Mourinho barged into the City dressing room to confront Pep Guardiola’s players over their “raucous” celebrations following the 2-1 derby victory.
Mourinho is understood to have accused City keeper Ederson of lacking “respect” as the angry words escalated into a bout of pushing and shoving that saw stewards and the police getting involved.
One eye witness told SunSport: “People couldn’t believe what they were seeing.
“It was going crazy for a few seconds, with loads of screaming and shouting. It looked like it might get completely out of control.”
Mourinho, furious at referee Michael Oliver for booking Ander Herrera for a second half dive which he was convinced should have brought a penalty for a foul by match-winner Nicolas Otamendi, had stalked down the tunnel at the end of the game.
The United boss had passed by the City dressing room to head towards the home enclave when the throbbing bass of the music being boomed out as the door open saw him turn around and head back.
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It is understood that the United boss then confronted Ederson, accusing him of play-acting and wasting time in the latter stages of the game.
The City players roared back in support of their keeper as Mourinho shouted at him: “Show some respect! Show some respect!”