"We have reviewed all the available footage and decided he (Fellaini) has no case to answer," an FA spokesman told AFP on Monday.

Footage on the YouTube website emerged which appeared to indicate Fellaini spitting near to Zabaleta's head while the City defender lay on the floor following a clash between the pair.

The FA did have the option of banning Fellaini retrospectively if it had found him guilty of misconduct.

Earlier this month, the FA banned Hull's George Boyd for three matches after he spat at Manchester City goalkeeper Joe Hart.

Match referee Michael Oliver booked Fellaini moments before the alleged spit towards Zabaleta for an elbow on the Argentina full-back.

After title contenders City's 3-0 win over Premier League champions United, Zabaleta said Fellaini was lucky to stay on the pitch.

"I was elbowed by Fellaini. It was a red card," he said.

United manager David Moyes said last week he had discussed the incident with Fellaini and stressed the Belgium international was adamant he'd done nothing wrong.

"I've spoken with Marouane and he says it isn't the case," Moyes said.

"We will work with the FA if that is what we have to do. Marouane is adamant that at no time did he (spit at Zabaleta). I don't think it (the footage) is completely conclusive, from what I've seen," the Scot added.