Skysports.com understands Kolo Toure is set for a disciplinary hearing with Manchester City officials next week as the club attempt to sanction the former captain for his drugs ban.
City, who supported Toure throughout the legal process and disciplinary hearings with the Football Association, have taken the surprise decision to try and discipline the defender eight months after the actual offence took place.
The latest revelation is an unwelcome distraction for high-flying City in the wake of the Carlos Tevez saga which has dominated the headlines in recent weeks at the club.
Toure was handed a six-month suspension in May for failing a routine drugs test after the Manchester derby at Old Trafford last February.
It emerged the banned substance found in Toure's drugs test came from a slimming tablet the player had taken.
The Ivory Coast international pleaded guilty to the offence and he made his return to action last month following the completion of his suspension.
However, City's hierarchy have now decided they will try and take their own action against the 30-year-old, who is under contract at the Etihad Stadium until the summer of 2013.
Toure is unhappy at the club's decision and he is believed to have the support of a number of his team-mates who have questioned the timing of the disciplinary case.
The Professional Footballers' Association is understood to be fully supportive of Toure in the case with chief executive Gordon Taylor expected to personally attend the hearing next week.
Toure and his legal team will attend the hearing which will be headed up by City's Football Administration Officer Brian Marwood and the club's lawyer Simon Cliff.
The player's adviser Saif Rubie admitted the defender was disappointed the club were planning to take action against him.
"Kolo is disappointed that the club have decided to take this stance and he will contest any planned action against him," Rubie told skysports.com.
"However, he will continue to give his all, as always, for Roberto Mancini and the team in their quest for honours this season."
Toure is expected to return to the City team as captain for Wednesday's Carling Cup fourth round tie against Wolves.