Paulo Ferreira failed to prevent Chelsea from losing against Arsenal at the Emirates Stadium yesterday. Robin van Persie, leading Arsenal's attack with Marouane Chamakh and Andrey Arshavin relegated to the bench, was twice off target as the old flaw of failing to transform possession into goals against Chelsea threatened to resurface.

Jack Wilshere's delicate chip brought a fine save from Chelsea keeper Petr Cech before Song gave Arsenal the lead they deserved a minute before the interval. They owed a debt to fine refereeing from Mark Clattenburg, who played a crucial advantage after Paulo Ferreira appeared to foul Fabregas to allow Song to slide a close-range finish past Cech.