A Manchester United fan has admitted assaulting Manchester City player Jack Grealish by slapping his face after he claimed the footballer insulted him.

Alfie Holt, 20, pleaded guilty to a single count of assault on Grealish, who he said had called him ugly and a swear word after the Manchester Derby on 6 April, Manchester Magistrates' Court heard.

Holt, a Manchester United season ticket holder in the Stretford End, was given a three-year Football Banning Order and ordered to pay a £120 fine. The defendant, of Droylsden, Tameside, told the court: "I did not expect [Grealish] to say what he said to me and I have reacted. I regret it. That's it."

Shazia Aslam, prosecuting, as quoted by court papers, told the court Grealish was leaving the field after the Manchester Derby at Old Trafford, which was always a "contentious affair".

"Both sets of fans were very vocal, shouting abusive comments to rival players," Ms Aslam said as quoted by the BBC.

The court heard that as players left the field, heading for the tunnel, Holt stood very close by, shouting abuse at City players.

Grealish then heard Holt's comments and walked back towards him before they had an "exchange of words", she said.

"As the complainant walks away, the defendant slaps the complainant across the face." She said there was no injury and Holt had been arrested outside the stadium.

In a witness statement, Grealish told police he could not hear what the defendant was shouting due to the crowd noise, so he walked towards him and tried to engage in conversation and leaned in to speak to him.

He said he was still unable to hear, so he moved to walk away when he was slapped.

After his arrest, Holt told police he had been drinking before the game "in town" and went to the match with his father.