Nasri has revealed he will be out for three months, meaning the Blues could take the opportunity to enlist a new player in their European squad - as they did with Stevan Jovetic

A photo posted by Samir Nasri (@samnasri8) onNov 18, 2015 at 2:41pm PST

Samir Nasri is at risk of being de-registered from Manchester City's Champions League squad after revealing that he will be out of action for three months.Injuries have restricted the Frenchman to a bit-part role in City's team this season and he has not played since a late substitute appearance against Bournemouth on October 17.Mystery had surrounded his fitness - he had returned to training at the end of October but was not involved in first-team squads - and on Wednesday night he revealed on Instagram that he will be out until the middle of February.With City already having qualified for the Champions League knock-out stage, Nasri's injury could represent an opportunity to include Kelechi Iheanacho, the 19-year-old prodigy who was left out of the club's original 25-man European squad, when registrations can be altered at the start of next year.Iheanacho does not qualify as a youth team player as he is not homegrown and has not been at City for more than two years - he was only officially registered with the Blues back in February, meaning he will need to be registered as one of the 25-man squad again next season.The Nigerian's absence has meant Wilfried Bony has been City's only available centre forward for Champions League matches in the absence of Sergio Aguero.But he could now be added to the squad at Nasri's expense, with the competition's last-16 ties due to be played on February 16 & 17 and 23 & 24.City have form in replacing injured players; Stevan Jovetic was left out in February of this year so new signing Bony could be included in the squad to face Barcelona in last season's knock-out stages.It also means, theoretically, that should City sign a new player in January he would be able to take Nasri's spot in the European squad, if the Frenchman is indeed to be left out.Jovetic, who moved to Inter on loan this summer after failing to establish himself as a City regular, revealed that the club's decision to exclude him from their European roster was a key factor in his departure."The day where I was left out by Manuel Pellegrini from the Champions League list, I decided to leave City" he said.