Manchester City midfielder Samir Nasri looks set to miss Sunday's Premier League match with former club Arsenal.
Nasri strained his hamstring during the 3-2 Champions League defeat at Real Madrid, but forwards Sergio Aguero and Mario Balotelli are available.
Arsenal goalkeeper Wojciech Szczesny is again sidelined by an ankle injury so Vito Mannone will continue in goal.
The game will come too soon for Jack Wilshere and Emmanuel Frimpong, who are back in training after long lay-offs.
Nasri, who moved from Arsenal to City last summer in a £25m deal, is not expected to be sidelined for long.
City manager Roberto Mancini said: "I do not think he will be ready for Sunday. We will try but it is difficult. I hope he will be okay for next week."
MATCH PREVIEW

Joe Hart might have been angry, but Yaya Toure saw the positives after Manchester City's dramatic defeat in Madrid on Tuesday. "We're already better than we were last year" was the Ivorian's upbeat progress report after a match in which he himself was almost unstoppable when powering forward.

With nine goals scored in their first four Premier League games, going forward is not a problem generally for City - but improvement defensively is needed. Yet to keep a clean sheet this season, the champions have conceded two or more goals in four of six games played in all competitions, and the defence does not look quite settled at the moment.
The same back four (or three or five!) have not started successive games yet and new recruits Maicon and Matija Nastasic will undoubtedly need time to bed in. I actually thought Nastastic had a fine debut at the Bernabeu and at 19 is a great prospect.
Real were a test and Arsenal will not be much less of one. Remember three weeks ago when they had not scored in their opening two games? Some were worried then that the goals would not come post-Robin van Persie, but with 10 strikes in the last three matches they most certainly have.
Gervinho's three in the last two mean he only needs one