Manchester City and Sergio Aguero are considering legal action after a supporter confronted the striker at the end of Monday's FA Cup loss to Wigan.
In the chaos that followed the full-time whistle at the DW Stadium, television cameras appeared to show Aguero raising his arm to push away a fan who was among the thousands that had entered the pitch.
City's all-time leading scorer Aguero has reported the individual shouted "suck my d**k" at him and spat in his ear, with the player and his club due to discuss with lawyers whether they believe a common assault occurred.
It is understood Aguero will face no disciplinary action from the Football Association following the incident as the governing body, who have reminded the striker of his responsibilities, are mindful of the scenario he found himself in.
The FA has confirmed it has charged both Wigan and City for failing to control their players after Fabian Delph was dismissed in the first half of Latics' 1-0 fifth-round victory.
Yet it is also thought players and staff from both sides have avoided punishment from the FA for the half-time row involving City boss Pep Guardiola and his Wigan counterpart Paul Cook.
The two managers exchanged heated words on the touchline following Delph's dismissal and the argument continued in the tunnel where TV cameras showed Guardiola having to be restrained by colleagues.
However, it is understood the FA is satisfied that no misconduct took place during the interval.
"Both Wigan Athletic and Manchester City have been charged for failing to control their players in relation to the dismissal of Fabian Delph during last night's Emirates FA Cup fifth-round tie," an FA statement said.
"The clubs have until 6pm on Friday 23 February 2018 to respond.
"In addition, both clubs have been asked to provide their observations following the crowd trouble at the end of the game and have until Monday 26 February 2018 to respond."
A number of Wigan supporters celebrated in front of the stand where City's visiting fans were situated, sparking disturbances among both sets of followers.
Advertising hoardings were ripped out and thrown onto the field along with other objects, while missiles were thrown from the pitch into the stand. There were also clashes between fans and police and stewards.
Police, who have now launched an investigation, acted to restore order but two arrests were made on suspicion of affray following an incident outside the ground.
Chief Superintendent Stuart Ellison of Greater Manchester Police said: "Football is a family event and the disruption that players and fans alike faced last night will not be tolerated.
"As soon as people were on the pitch, we immediately deployed our resources to the front of the stands, where they were able to keep the two groups of supporters apart and prevent any further disruption.
"Emotions always run high at football matches, and sometimes, this means that officers have to intervene to ensure the safety of the fans."
City have not commented but it is understood the Premier League leaders feel the level of stewarding was inadequate and are concerned the safety of players was endangered.
Wigan said they too had started making inquiries.
Chief executive Jonathan Jackson said: "Whilst we appreciate that the vast majority of supporters who ran on to the pitch did so spontaneously to celebrate a famous victory, we were disappointed with the action of a minority of supporters who acted in an inappropriate manner.
"Player and staff safety is of paramount importance and we will conduct a full investigation."
Will Grigg scored a late winner for League One Wigan to end City's quadruple prospects.