David Silva doubtful for Manchester City's derby clash with Manchester United

David Silva has given Manchester City a derby scare.

The Spanish ace is out of tonight’s Champions League game in Dortmund.

And he is a doubt for Sunday’s clash with United. City boss Roberto Mancini said: “Silva has a problem because he’s very tired, he has a problem with his back and his hamstring.


“We will try and let him recover for Sunday but it’s difficult.”

Mancini has told his other big stars it is time to raise their game.

City trail Premier League leaders United by three points after six draws this season.

They have also slipped out of the Champions League and could even finish bottom of their group unless they beat Dortmund tonight.