Chelsea will find out on Tuesday whether they have been successful in their appeal against Mikel Jon Obi's red card at Manchester United.
The 20-year-old midfielder was handed a straight red by referee Mike Dean for his challenge on Patrice Evra in the first half of Chelsea's 2-0 defeat.
Chelsea submitted a claim for wrongful dismissal on Monday and a regulatory hearing will decide on Tuesday.
The red card cannot be reduced to a yellow by the FA's commission.
So if the hearing deems Mikel's tackle worthy of a card of any colour, the sending off will stand.
"We were playing well until Mikel was sent off and the game changed. It seemed the wrong decision," said new Blues manager Avram Grant after the match.
Chelsea's Mikel Jon Obi has failed in his appeal against his red card in their 2-0 defeat at Manchester United and must serve a three-match ban.
He was shown a straight red card by referee Mike Dean for a first-half challenge on Patrice Evra.
As Fifa does not allow cards to be downgraded Chelsea could only have won the appeal if they had proved that no action at all should have been taken.
Blues boss Avram Grant said the card was "wrong and changed the game."
The ban, which only affects domestic football, comes into force immediately, ruling him out of the Carling Cup trip to Hull and Premier League fixtures against Fulham and Bolton.
Mikel's suspension may not be the last repercussion for Chelsea following the Old Trafford fixture.
Chelsea skipper Terry appeared to grab referee Mike Dean's red card as he sent off Mikel.
Reports say Terry's actions have been mentioned in Dean's official report.
Avram Grant has voiced his disappointment at the Football Association's decision to reject Chelsea's appeal against Mikel John Obi's sending off against Manchester United on Sunday.
Mikel was red-carded by referee Mike Dean during Chelsea's 2-0 defeat at Old Trafford for a challenge on Patrice Evra.
But Chelsea's appeal was dismissed by the FA's disciplinary commission earlier today.
The Nigerian midfielder will now serve a three-match suspension, starting with Chelsea's Carling Cup third-round tie at Hull on Wednesday.
Mikel will also sit out The Blues' next two Barclays Premier League games - at home to Fulham on Saturday and at Bolton the following weekend.
Grant said: "I am very disappointed and surprised. One of things I teach my players and even my children is that when you make a mistake you can admit it.
"I can promise if I make a mistake I will tell you. It has happened to all of us - nobody is perfect.
"The referee made a mistake - he made three mistakes - but one of them he could correct and he didn't do it, so I am very disappointed.
"On Sunday, the referee affected the result with three bad decisions. Our players were very disappointed but I like their reaction. If I saw something wrong, it was the decisions of the referee."
Grant has now had time to work with the players following his shock elevation to the job as Jose Mourinho's successor last Wednesday.
Although his first game in charge ended in that 2-0 defeat against United, he believes he has the full backing of the players despite continuing stories of dressing room unrest.
Grant said: "I think I have the backing of the players. I can only judge them by their actions or by the words they speak to me.
"I spoke with the players individually and even before I became a manager. My relationship with them is good and I enjoy working with them. You saw on Sunday their attitude was at a high level.
"In training and on the pitch I think Chelsea can be very proud of these players. They are very professional and have a good attitude, I don't see one problem so far.
"But look, I don't think anyone is happy from this situation. The situation has happened but nobody in the club was happy. But it has happened and this is football, it is not the first time it has happened.
"But we need to adapt to it as soon as possible, and I think all of us, the players and the management have done that and we are looking forward to improving our quality of football, that is our goal.
"I am very happy with their attitude, even from the injured players, they all want to play.
"Didier (Drogba) started training on Monday, one week before we expected, Ricardo Carvalho started training on Tuesday and Frank Lampard is doing very well, so I expect to see them in the team soon."
Grant has spoken to most of the players, both individually and as a group, and he has been heartened by the reaction so far. But he knows that in a squad of 25, he knows there will always be someone who is a unhappy.
Grant added: "It has been much better than I thought and I am sure it will be much better from now. When you have 25 players in the squad it sometimes happens that one or two are not happy.
"For the moment, I have not seen that. I am a very positive person - I like to think about the positive things the players can bring to Chelsea.
"I know some will not be happy because I know it cannot be 100% happiness."
Grant admits it is not an ideal time to take charge but insists he had no hesitation about moving into Mourinho's seat.
He is now determined to get Chelsea playing the kind of stylish football billionaire owner Roman Abramovich desires - but he warns that it will take time.
Grant added: "I am not naive, I know it is not an ideal time to take the team. No time for preparation or to put my style into the team.
"It is not an ideal time but I believe in this team, the club and the players. I saw them last week- they were very sensitive but very professional also - I like that combination.
"I think we can do something here. This season we haven't played so well or scored enough goals, so we need many things to improve and in a short time.
"We need to build a style through training but it is a process, it is not arriving in one day.
"As long as I am at the club, I try to do my job. Chelsea need to improve the style of the team and I think we can do it with these players.
"You cannot switch it overnight. But I don't think we need a long time.
"I will try to get the best from all the players. You will see, even in a short time, that Chelsea will be better than the beginning of the year."
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