Jordan Henderson scored his first Chelsea goals to help his new side to a dominant victory over Bournemouth.
The 36-year-old midfielder, making his home debut, fired in off the post after just 68 seconds, before adding a second after the break. Joao Pedro also scored twice, while Morgan Rogers was on target.
Evanilson pulled one back to briefly give Bournemouth hope at 3-1, but the Cherries remain winless in the Premier League under new manager Marco Rose.
Chelsea's romp began in the second minute when Henderson scored with their first shot of the game, curling a shot in off the inside of the post after being played through by Cole Palmer, who signed a new contract until 2034 in the hours before kick-off.
Just 84 seconds later, Henderson played in Rogers, whose cross-shot was flicked over Bournemouth goalkeeper Djordje Petrovic by defender Antonio Silva. Rogers was awarded his fourth goal of the season after a check by the video assistant referee.
Having given the ball away too often in the opening few minutes, Bournemouth threatened to pull one back, but Brazilian forward Rayan flashed a shot over before the Cherries briefly began to settle.
However, Henderson threatened to extend Chelsea's lead midway through the half with a lofted effort from the edge of the box.
Rayan had another one-on-one effort saved in the 35th minute before Chelsea goalkeeper Emiliano Martinez denied Ryan Christie at the other end. Bournemouth defender Silva also had a header saved just before half-time.
Bournemouth brought on Ben Gannon-Doak at half-time, but 30 seconds later they were 3-0 down.
Joao Pedro fired into the top right-hand corner after Pedro Neto reacted well to another Silva mistake in the box.
Evanilson pulled one back five minutes later when Moises Caicedo's clearance ricocheted off him after a dangerous corner fell at his feet inside the six-yard box.
But Joao Pedro tapped in a Pep Chavarria cross moments later before Henderson curled a 25-yard free-kick past Petrovic to round off the scoring.
Chelsea's first win in four matches lifts them into the top five. Bournemouth, meanwhile, are only outside of the relegation zone on goal difference.
