KICK-OFFpublished at 14:33 British Summer Time 23 August 2015
West Brom 1-3 Chelsea
Chelsea start the second half and immediately look to build from the back.
Chelsea hold on for first win of season
Terry red for hauling down Rondon
Pedro low strike and assist on debut
Courtois saves Morrison penalty at 0-0
Chris Osborne
West Brom 1-3 Chelsea
Chelsea start the second half and immediately look to build from the back.
And here's how Pedro scored on his debut, linking up with Hazard.
Plenty of possession, as well as goals, for Chelsea in that first period.
There's a Spanish flavour to Chelsea's goals in that half. Pedro, Costa, Azpiliceuta - all Spanish and all on the scoresheet.
West Brom 1-3 Chelsea
West Brom 1-3 Chelsea
Azipilicueta is terribly excited, he's now having a pop from 20 yards. But it's blocked. And there's the half-time whistle - there were four goals in 22 minutes - can we expect more?
We'll have two minutes of injury time. So we could have another couple of goals before the break...
Cesar Azpilicueta
It's not only raining water at The Hawthorns. It's raining goals too.
Cesc Fabregas chips a harmless looking ball to Costa, who outmuscles Gareth MacAuley on the edge of the area and chests down to Cesar Azpilicueta. The full-back hits it first time into the bottom left-hand corner for his first ever Premier League goal.
#bbcfootball
Go go gadget Pedro. Chelsea's new signing puts it on a big round plate for Willian, who side-foots wide from 16 yards out. It was a superb chance.
West Brom have their tails up. Callum McManaman turns Cesc Fabregas who moves as quickly as a combine harvester. Chris Brunt's cross is into the arms of Thibaut Courtois.
James Morrison
James Morrison has hit this about three hundred times better than his penalty.
Chris Brunt's deep cross from the left is brilliantly kept in by an acrobatic volley from Salomon Rondon, who cuts it back and Morrison sweetly slams it in from the edge of the area.
West Brom 0-2 Chelsea
Chelsea fans have changed their tune now. This win would pull them away from the relegation zone - so now the song is "We are staying up".
Diego Costa
Premier League? No problem for Pedro.
The Spaniard now has an assist as Chelsea score from a counter after a West Brom corner.
Willian takes the ball deep into Albion territory, feeds Pedro down the right channel of the area and the Spaniard hits what is probably a shot across goal - but Costa is able to poke it in.
Nemanja Matic, not content with clobbering opposition players, has just boshed into Costa when the striker was chasing a Cesc Fabresgas through ball.
Chelsea fans are having a bit of a sing song.
"Are you watching Manchester?"
I'm no genius, but it's probably got something to do with Chelsea beating United to Pedro's signature.
West Brom 0-1 Chelsea
West Brom will be ruing that penalty miss even more now.
With Saido Berahino not in the squad, there was debate among the Albion players who would take the spot-kick. James Morrison and Chris Brunt had a few words. Surely you know who your penalty taker is?
It should be noted that the rain at The Hawthorns is teeming down - Kevin Costner in Waterworld type heavy.