Arsenal captain William Gallas has escaped disciplinary action over his clash with Manchester United's Nani.
United manager Sir Alex Ferguson has claimed the French defender should have been sent off at the weekend by referee Alan Wiley for kicking Nani from behind in response to the Portuguese midfielder indulging in some ball-juggling.
However the Football Association confirmed today that Wiley had looked at video footage of the incident.
An FA spokesman said: 'Having viewed the footage, the referee was not satisfied that it showed evidence of violent conduct and therefore no further action will be taken.'
For the FA to take action, Wiley would have had to have deemed the clash worthy of a red card for violent conduct.
The decision will be sure to infuriate Ferguson, who said after the 4-0 win by United: 'I thought Gallas should have been sent off. The referee must have a look at that again.
'He kicked Nani from behind and the referee called both over because they sized each other up. He should have been red-carded.'
Meanwhile, Gallas has warned his team-mates they will have to fight every inch of the way if they are to win the title or enjoy European glory.
Gallas says United will have taken huge confidence from their win over the Gunners in the FA Cup, and that Arsenal's players have to be ready for the conflict.
A visit by AC Milan on Wednesday night is the next challenge facing Arsenal, and Gallas said the team need to step up their approach for both that and the Premier League campaign.
He told Arsenal TV: 'The title is a dream and to get that dream you have to fight.
'We have to take it game by game, and we have to be ready for the fight. We know it will not be easy for us, and Manchester United will have confidence and if we want that title we have to fight.
'The defeat was very tough for us. We did not play well. We know we were not good at all.
'Everyone was disappointed and now we have to work and work again to see what we can do in the Champions League and the Premier League.
'We have to put the game behind us. On Wednesday it will be different as we are at home and we can play our game, but away we have to fight and we didn't fight on Saturday.'