Salomon Kalou's hat-trick helped a rampant Chelsea thrash Stoke and return to the top of the Premier League.

Kalou headed home Didier Drogba's cross before Stoke keeper Thomas Sorensen sustained a dislocated elbow as Kalou slid in to score his second goal.

Lampard made it 3-0 from the spot after Robert Huth fouled Kalou, who then ran clear to complete his hat-trick.

Lampard hooked home a fifth and Daniel Sturridge's cool finish and a Florent Malouda tap-in completed the rout.

Chelsea move a point clear at the summit with two games to go and their performance was an emphatic response to last week's defeat by Tottenham that had given Manchester United renewed hope in the title race.