Premiership leaders Chelsea strolled to a simple 4-0 victory over Norwich, with Jose Mourinho's side simply too good for their hapless opposition at Stamford Bridge.

First half goals for Damien Duff, Frank Lampard and Arjen Robben ended the match as a spectacle, as The Blues underlined the gulf in class between these two sides, with Didier Drogba wrapping up the scoring late on.

Chelsea barely raised a sweat in the first half yet found themselves three goals to the good.

Norwich looked solid for long periods, but found their every error punished by a clinical Chelsea side that are beginning to believe that they can claim greatness.

A dreadful blunder by Denmark international Thomas Helveg gifted Chelsea a first, the former Internazionale and Milan man showing anything but Italian vision when he failed to spot the lurking Duff as he myopically played the ball back.

The Irish winger was onto the loose ball in a flash, earned a yard of space on the edge of the box and slotted with consummate ease past Robert Green.

To their credit, The Canaries regrouped and the lively Leon McKenzie - on after an early injury to Mathias Svensson - and loan star David Bentley were showing some nice touches.

But on the half hour mark it was 2-0, when Lampard was on hand to score his 50th Premiership goal in some style.

The England man had seen a couple of half chances drift over but, when Robben was gifted the ball cheaply, was on hand to receive the ball on the edge of the box and pick out the top left hand corner of Green's goal with sublime ease as the Norwich defence stood off.

Nigel Worthington must have wondered what he had done wrong, but Chelsea looked like they still had gears they could move into and ten minutes later they grabbed a third with a move that would have carved apart any defence in Europe.

Robben started and finished the move, picking out Lampard on the edge of the area and running on as Lampard dinked the ball over his marker to Tiago.

The Portuguese star's deft flick with the back of his heel dropped perfectly for Robben, and he made no mistake in thrashing the ball low and hard to Green's right.

Any thoughts of an unlikely second half comeback were ended fairly swiftly by the differing spirits of the teams.

Chelsea, still playing within themselves, were simply too good for Norwich, and they had a plethora of opportunities to add to their first-half tally.

Tiago had a shot just over, Eidur Gudjohnsen delayed too long when put through six yards out and Lampard volleyed over from a free kick.

It was being played at the pace of a training ground match by now, and Norwich's players looked to have given up the ghost.

Drogba came off the substitutes' bench and should have scored when Robben's craft carved out a one-on-one, but dwelled on the ball and allowed his effort to be blocked.

Robben himself had a glorious chance to add to his tally, but after being picked out at the far post, put his volley up in the air rather than in the back of the net.

Constant Chelsea pressure was met with precious little resistance from a Norwich side that looked streets away in quality and, perhaps more worryingly, desire to win.

Lampard also could have added to his tally, firing wide and then bringing a fine save from Green, before Drogba rose like a salmon to head home a corner with seven minutes remaining.