The Football Association will take no action against Arsenal's Robin van Persie after his clash with Manchester United midfielder Kieran Richardson.
United boss Sir Alex Ferguson accused Van Persie of elbowing Richardson in his side's Carling Cup victory.
"He was lucky to stay on. The FA will have to take a look at that," he said.
But the FA said it had "reviewed the actions of all the players involved and is satisfied that no further disciplinary action is required".
Arsenal boss Arsene Wenger admitted he feared Van Persie could have been sent off.
"I did fear it was going to be worse than a yellow card, it could have
been," he said.
"Robin shows great potential but he has to learn to keep his nerves under
control and not get over-excited.
"I considered bringing him off because he was involved in some heated