Chelsea maintained their perfect start to the Premiership season with a comfortable 4-0 win over West Brom.

Frank Lampard celebrated the birth of his daughter Luna with a well-taken double as The Blues moved to the top of the Premiership table with their third consecutive victory.

Joe Cole and Didier Drogba also scored for the home side as they put an end to The Baggies' unbeaten start to the new campaign.

New faces Michael Essien and Shaun Wright-Phillips were both handed their first full starts by manager Jose Mourinho, who made a total of six changes to the team that defeated title rivals Arsenal on Sunday.

The hosts were some way short of their best form in the first half but grew in confidence as the game went on to see off a Baggies side that failed to have a shot on target in the entire 90 minutes.

A defensive lapse resulted in the deadlock being broken midway through the opening half as Thomas Gaardsoe's poor pass gifted away possession and caught the away team short of numbers at the back.

Wright-Phillips sent Drogba away on the right wing and the striker's low cross was dummied by Essien before reaching Lampard, who could afford to take a touch before placing the ball in the bottom left corner.

The goal, his 50th for the club, was greeted by special celebrations from the England midfielder, who became a father for the first time earlier in the week.

A William Gallas header from a corner forced Chris Kirkland into his first save of the match, but the custodian was soon beaten again as Cole scored Chelsea's second just before the break.

The England international, making his first start of the season, was left with the simple task of finding the target from eight yards out after Wright-Phillips had chased down what appeared to be a lost cause to keep the ball in.

With the two-goal half-time cushion meaning there would be no last-minute nerves this time around, Chelsea piled on the pressure in the second half as they began to find some fluidity to their attacking play.

A fantastic double save from Kirkland stopped both Essien and Drogba, while only a great sliding tackle from Neil Clement stopped the Ivory Coast front man going in on goal after Gaardsoe had once again given away possession cheaply.

However, the former Marseille player was not to be denied moments later when he slammed home from close range after West Brom had failed to clear a corner.

Mourinho was allowed the luxury of throwing on Damien Duff and Arjen Robben from the bench, and it was a lucky deflection off the latter that allowed Lampard to volley home to complete the scoring.

Kirkland kept out another effort from Essien in the closing stages, but the Ghanaian must have been pleased with his contribution as Chelsea stretched their unbeaten run in the league to 33 matches.