The Football Association has granted Joey Barton an extension until midday on Wednesday to respond to two charges of alleged violent conduct.
QPR midfielder Barton was sent off during Sunday's dramatic 3-2 defeat by Manchester City at the Etihad Stadium after clashing with Carlos Tevez early in the second half.
Before leaving the field, the 29-year-old then aimed a kick at Sergio Aguero and then attempted to head-butt City captain Vincent Kompany.
He was ushered away by team-mates and City substitute Micah Richards and almost became embroiled in a further confrontation with Mario Balotelli before eventually making his way down the tunnel.
Barton, who according to his Twitter account is currently in Portugal, will serve a minimum four-game ban for the red card which was issued by referee Mike Dean, and could be facing an extended suspension if he is found guilty by the FA.
A statement from the FA read: "The deadline of 6pm on Tuesday 15 May, which Joey Barton had until to respond to the two FA charges against him for alleged violent conduct has been extended to 12 noon on Wednesday 16 May following a request from his representatives.
"The charges against the Queens Park Rangers midfielder are in relation to Sunday's match against Manchester City at the Etihad Stadium.
"Following the player's dismissal in the 54th minute of the fixture, there followed two incidents involving Manchester City's Sergio Aguero and Vincent Kompany.
"As Barton had already been dismissed, both of these incidents fell outside of the jurisdiction of the referee."
Meanwhile, Professional Footballers' Association chief executive Gordon Taylor has spoken of his exasperation at Barton's latest misdemeanours.
The Rangers skipper, who could now be suspended for the first 10 matches of next season, has had more than his fair share of run-ins with the authorities during his 11-year career.
Barton stubbed a lit cigar in the eye of young team-mate Jamie Tandy while at City in 2004, left Ousmane Dabo needing hospital treatment after a training ground fight in 2007 and was jailed for six months for assault the following year.
"I just feel sometimes like it is pushing a boulder up a hill, it slips back and you decide whether to go again," Taylor said. "We try to deal with Joey Barton and it is not getting any easier.
"It has certainly been a backward step for him and his future in the game.
"There are people that seem to be improving and then slip back, it is a human condition. No-one is perfect but you only have one career."