Back on track
Frank Lampard made it 3-1 Chelsea as the Blues secured a win for under-pressure manager Carlo Ancelotti.
Didier Drogba levelled after Peter Odemwingie gave West Brom an early lead against Chelsea.
Frank Lampard helped ensure Chelsea move to within a point of Arsenal.
Fernando Torres' drought continued as he had a goal disallowed against West Brom.
Robbie Keane scored after only two minutes to give West Ham the lead at home to Aston Villa.
Gabriel Agbonlahor scored a last-gasp header to condemn West Ham to defeat.
Sebastian Larsson opened the scoring for Birmingham at home to Sunderland.
Craig Gardner doubled Birmingham's lead as Sunderland slumped to another defeat.
Hugo Rodallega gave Wigan the lead against Blackpool at Bloomfield Road.
Mohamed Diame's shot came off Neal Eardley to make it 3-0, leaving Blackpool in the bottom three.
Leon Osman opened the scoring as Everton beaten Blackburn Rovers 2-0.
Leighton Baines scored from the spot as Everton put Blackburn deep into trouble.