Manchester City striker Carlos Tevez has launched an appeal to the Premier League against the fine of six weeks' wages imposed on him by the club, BBC Sport understands.
Tevez was fined £1.2m after being found guilty of gross misconduct, and lost a subsequent appeal to the club's board.
The Premier League will now need to schedule a hearing, although it is unclear when it will take place.
It is still the case that the player is not expected to leave Manchester City before the transfer window closes on Tuesday evening and the decision to appeal against the fine will further complicate any return to the club.
The saga began when Tevez was fined two weeks' wages after boss Roberto Mancini alleged the striker refused to come on as a substitute during City's tie against Bayern Munich in a Champions League tie in September, although the Argentine claimed there had been a misunderstanding.
He left for South America and was fined six weeks' wages following the charge of gross misconduct, while it is understood that he has not been paid his salary, estimated at £200,000 a week, since the end of November.
Prior to the Bayern match, Tevez had also forfeited £6m in loyalty bonuses because of his previous requests to leave City, to whom he is under contract until June 2014.
He has been linked with moves to AC Milan,Inter Milan and Paris Saint-Germain during January, but a deal is yet to materialise - with Mancini insisting City will only consider a permanent move, not a loan.
A Premier League statement read: "The Premier League received correspondence from Carlos Tevez last night giving notice of Mr Tevez's intention to appeal against a disciplinary sanction imposed on him by his club, Manchester City.
"Premier League rules allow for players to appeal disciplinary decisions under Section K and the Premier League Board will consider this request at the earliest available opportunity."