Third-placed Chelsea also kept up the chase when a first-half Joe Cole goal gave them a 1-0 win at Blackburn Rovers.
English Premier League: Complete Coverage
Chelsea weathered some early Blackburn pressure before striking with a sweetly taken goal by Cole after a killer through-ball by Salomon Kalou in the 22nd minute.
Both goalkeepers then made excellent first-half saves as Petr Cech pushed a Steven Reid shot on to the bar and Brad Friedel dived to tip a Frank Lampard effort against a post before Chelsea tightened up to secure the victory.
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