This is the moment Roy Keane allegedly elbowed an Arsenal fan's nose in a fracas just moments after the former Manchester United footballer was 'headbutted'.<br /><br />Scott Law, 43, of Waltham Abbey, Essex, has pleaded not guilty to assault by beating over the incident at a Premier League match at Emirates Stadium last September.<br /><br />Chaos ensured towards the end of Arsenal's 3-1 victory over Manchester United, where ex-Ireland international Keane was working as a pundit for Sky Sports.<br /><br />Keane told Highbury Corner Magistrates' Court yesterday that he was left 'in shock' after being allegedly 'headbutted' backward through doors during the match.<br /><br />But Law has claimed he was rushing to the toilet, and was using his head in self-defense after Keane came at him and repeatedly called him a 'fatty'.<br /><br />Law added that Keane's reputation as a violent 'hard man' meant he feared attack – and his legal team, who provided enhanced CCTV evidence, said Keane threw an 'uppercut elbow' at Law's nose, reported the Evening Standard.<br /><br />Charles Sherrard KC, defending, told Keane: 'You chose to confront him. When you saw him, you said 'Say it to my face you face But Keane denied this.<br /><br />The clip also showed Keane's colleague Micah Richards grabbing hold of Law before letting him go. The court was told Richards said: 'Are you crazy? Are you mad? Say sorry.<br /><br />Richards was also alleged to have said later: 'Someone needs to arrest him, he's just assaulted Roy Keane, don't let him go.'<br /><br />Earlier yesterday, Keane, 52, told the court that the incident happened when he and fellow Sky pundit Richards were walking down for the final match analysis.<br /><br />'There was lots of noise and shouting, as you would expect at a football match,' he said. 'I was just walking and, before I knew it, I was hit. I felt the contact and fell back through some doors.<br /><br />'I was not expecting it. The only way I can describe it is that I was in shock. I didn't expect it to happen, not when I was in my workplace.'<br /><br />Footage was posted on social media of Richards stepping in to calm an apparent confrontation.<br /><br />On this, Mr Keane told the court: 'Micah then gets hold of someone. He was just trying to get a grip of him and make sure he didn't run off.<br /><br />'I was saying 'Call the police'. For about 15 or 20 seconds Micah was holding him up against a wall (to stop) him getting away.'<br /><br />Law then fled the scene after Mr Richards lost his grip, the court heard, before the two pundits headed pitch-side to give their post-match analysis.<br /><br />Mr Keane added: 'We missed the final two goals but that was the least of my worries.'<br /><br />He claims to have suffered bruising on his chest and arms as a result of the incident.<br /><br />A video played to the court showed Law, an Arsenal fan, turning to the Sky Sports broadcast box after VAR ruled out a goal for Manchester United.<br /><br />He then appeared to leave his seat before making his way to the club level, where he crossed paths with Mr Keane.