The Spain midfielder, who was not playing at the time because of a knee injury, always maintained his innocence, and an independent commission has now found there was not enough evidence on two charges of improper conduct.

While the outcome of the investigation was concluded last week, the FA had not wanted to make any public statement until after the end of the Barclays Premier League season on Sunday, when Hull will face champions Manchester United needing victory to guarantee their top-flight status.

Hull manager Phil Brown, who made the allegations live on television in a post-match interview, was also charged by the FA following his outburst at referee Mike Riley, and has requested a personal hearing into that matter.

A statement from the FA read: "The FA can confirm that, at a regulatory commission hearing, two charges of improper conduct against Arsenal midfielder Cesc Fabregas were found not proved.

"The charges related to Fabregas's conduct following the FA Cup match between Arsenal and Hull at the Emirates Stadium on 17 March.

"One charge concerned his conduct after coming onto the pitch following the final whistle. The second charge related to an allegation of spitting."

Fabregas was also criticised by Brown for the manner in which he celebrated on the pitch after the final whistle.

However, the 22-year-old said: "Eight players were on the pitch as well, so then everyone should be suspended."

On the allegation of spitting, Fabregas reflected: "If I am suspended for that, my heart and my mind will be relaxed because I have not done anything wrong."

Neither referee Riley nor any of the other match officials mentioned anything of such an incident in their report to Soho Square.

Horton, though, had contacted the League Managers Association to lodge a complaint before Hull, and subsequently Arsenal, were asked by the FA to submit their observations.

Arsenal manager Arsene Wenger welcomed the news that the case against Fabregas had not been proven.

"It is relief because personally I always believed he was innocent. That it has been confirmed by the FA is very good news for us," Wenger said.

"You have to respect that if the FA comes out and says there is nothing about the whole inquiry to punish Cesc Fabregas, then we have to respect that as well."