Samir Nasri
Nasri suffered a hamstring strain in the win over BournemouthGetty Images

Manchester City midfielder Samir Nasri has joined a growing list of injury absentees and could now also miss Sunday 25 October's showdown with Manchester United. Manuel Pellegrini's plans have already been disrupted by the loss of Sergio Aguero, who is facing another month on the sidelines after he was stretchered off while playing for Argentina in a World Cup qualifier.

David Silva was another injury loss during that international break with Gael Clichy and Fabian Delph also ruled out. Nasri could make it five players unavailable after suffering a hamstring problem in the 5-1 victory over Bournemouth on 17 October, despite staying on to the finish of the game. Ahead of City's crucial Champions League tie with Sevilla, Pellegrini admitted the club will have to monitor him carefully over the next few days.

"Nasri has a problem with his hamstring," Pellegrini said, Goal report. "I don't know because I didn't talk with the doctor yet, but I think it will be very difficult for him [to play on Wednesday].

"Unfortunately we knew that he was feeling something after we made the third change [against Bournemouth] so if not maybe I can change him before. He didn't run too much, he stayed in the middle so we will see in the next few days what happens with him."

While both Raheem Sterling and Kevin de Bruyne find themselves in excellent form, City will still rue the absence of Aguero, who scored five goals in his last appearance for the club in a 6-1 thrashing of Newcastle United.

"Aguero is out for a month," Pellegrini said. "Maybe next week Clichy, Delph and Silva will be fit."

City once again have a fight on their hands to qualify for the knock-out stages of the Champions League. The club lost their group opener to last season's runners up Juventus and needed a last-minute penalty to beat Borussia Monchengladbach last time out. Pellegrini's side now face back-to-back matches against reigning Europa League champions Sevilla.