Frank Lampard's first-half penalty earned Chelsea a 1-0 victory at Manchester City to close the gap on leaders Manchester United to six points.
Lampard drilled home from the penalty spot just begore the half-hour after Micah Richards' clumsy challenge had brought down Salamon Kalou in the box.
City, who saw an earlier Darius Vassell drive saved by Petr Cech, did their best to get back into the game with Joey Barton being denied a penalty and the midfielder then drilling a volley just wide.
The visitors could have doubled their lead when Lampard lobbed the ball over Andreas Isaksson but Richards cleared.
Shaun Wright-Phillips then saw a swerving 25-yard shot cannon back off Isaksson's crossbar, while Barton's 25-yard shot fizzed wide.
Jose Mourinho's men face Sheffield United at home on Saturday, while Stuart Pearce must raise his Blues against Middlesbrough.