Manchester City's Samir Nasri is expected to miss almost a month of action because of a calf strain.

Manuel Pellegrini made the announcement Friday ahead of his club's clash with Arsenal, saying the timetable for the midfielder's return is three weeks to a month.

He's been an important component during the team's impressive unbeaten run, as City have not lost a game since their Nov. 5 Champions League match against CSKA Moscow.

While he's struggled to find the back of the net this season, scoring just one goal, Nasri has done well as a provider, recording six assists in all competitions.