Williams Gallas (l) and Nani square up during Saturday's game

Gallas appeared to kick Nani from behind during Arsenal's 4-0 FA Cup loss to United at Old Trafford on Saturday.

Red Devils manager Alex Ferguson felt Gallas should have received a red card.

But after viewing video footage the FA said: "The referee was not satisfied that it showed evidence of violent conduct and no action will be taken."

For the FA to take the matter further, referee Alan Wiley would have had to deem the clash worthy of a red card.

606: DEBATE Should Gallas have been punished?

Arsenal had Emmanuel Eboue sent off in a fiery second-half and a furious Ferguson said Gallas should have followed.

"I thought Gallas should have been sent off," Ferguson said after the match. "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've been red-carded."