WBA nine league games without a win - only earned 12 points from their past 20 fixtures
Antonio Conte's 50th Premier League game in charge of Chelsea
It is going to be a great Match of the Day tonight.
These are the scores from elsewhere.
BBC One at 22:20 GMT for Match of the Day, although it will be understandable if a few Baggies fans don't feel like watching.
Image source, .West Brom 0-3 Chelsea
Boos from the home fans at half-time.
Chelsea have torn West Brom apart and are good value for their 3-0 lead.
Tony Pulis needs one incredible half-time team talk.
West Brom 0-3 Chelsea
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
West Brom 0-3 Chelsea
Wale Ibraheem: Chelsea have not even reached for the next gear and they are 3 up. Are WBA that bad?
West Brom 0-3 Chelsea
This is just the sort of game Chelsea need before a very long trip to Azerbaijan in midweek as they play away against Qarabag in the Champions League on Wednesday (17:00 GMT).
Antonio Conte's side are second in Group C and will qualify for the last 16 if they beat the side that are bottom of the group, with only two points from their first four games.
We may well see some big names getting the chance to get some rest in the second half as this match looks done and dusted already.
West Brom 0-3 Chelsea
Martin Keown
Former Arsenal defender on Final Score
Marcos Alonso stands on the six yard area and it's the land of the giants at the back. But no-one in the Baggies box thought to pick him up. A nightmare.
Marcos Alonso (Chelsea)
We said it was in a dangerous area...and Chelsea now lead 3-0.
The free-kick was on the side of the penalty area and Cesc Fabregas floated it into the back post, where Albion defenders are sleeping and that allows an unmarked Marcos Alonso to volley into the net from close-range.
Image source, Rex FeaturesWest Brom 0-2 Chelsea
A rare chance for West Brom sees Ahmed Hegazi head wide. He then concedes a free-kick in a dangerous area at the other end...
West Brom 0-2 Chelsea
Hazard scores = Chelsea win.
BBC Sport app users may need to click on the link to see the tweet.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
West Brom 0-2 Chelsea
Replacing Diego Costa was never going to be easy, but what an impact Alvaro Morata has had at Chelsea.
BBC Sport app users may need to click on the link to see the tweet.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
West Brom 0-2 Chelsea
Morata is still on and just collected the ball and knocked a sideways pass. Luckily for Chelsea, he seems OK to carry on.
West Brom 0-2 Chelsea
Alvaro Morata is down and looking in trouble. It came after Ben Foster nearly played himself into trouble by dithering with the ball as the Spanish striker charged in.
One to monitor for Chelsea.
West Brom 0-2 Chelsea
Betiku Victor: Hazard looks angry and feisty.
Mudiaga Akpotor: Hazard and Morata! What a terrific partnership!
SAMBA JAWO: When it comes to so-called big matches, Christensen is the safe bet for Chelsea in defence. Very steady and composed.
West Brom 0-2 Chelsea
Martin Keown
Former Arsenal defender on Final Score
If Ben Foster makes the ball by sprinting out then great defending, well done. If he doesn't it's disaster, and that is a disaster.
He will have got out of bed this morning determined to do well this afternoon, but sadly he is the reason West Brom are 2-0 down now.
Image source, ReutersEden Hazard (Chelsea)
One of the assists of the season.
Cesc Fabregas passes the ball forward, Alvaro Morata, with his back to goal and 30 yards out, flicks the ball with his heel and it falls perfectly for Eden Hazard, who takes the ball around the onrushing Ben Foster and puts it into the net.
The champions are 2-0 up already and it is looking another desperate afternoon for West Brom and Tony Pulis.
Image source, Getty ImagesWest Brom 0-1 Chelsea
Garth Crooks
Former Spurs striker on Final Score
I played with Banks, Shilton and Clemence, some of the best ever. For the second time this afternoon a keeper has pushed the ball back into the danger area and concedes a goal on a rebound.
Garth's comments come after James McArthur scored in a similar fashion for Crystal Palace against Everton earlier today.
West Brom 0-1 Chelsea
He made the goal two minutes ago, now Eden Hazard is in the book following a late, and deliberate, foul on Albion's Grzegorz Krychowiak.
Alvaro Morata (Chelsea)
With his eighth Premier League goal of the season, Alvaro Morata puts the champions ahead.
It comes after some excellent work from Eden Hazard, who runs at the home defence and unleashes a shot from 25 yards out, which Ben Foster does well to get a hand to.
But the goalkeeper can only push the ball straight into Morata's path and he slides the ball into an unguarded net.
Image source, ReutersWest Brom 0-0 Chelsea
Excellent defending from Gareth McAuley keeps us goalless.
Cesc Fabregas slides in a pass to Tiemoue Bakayoko, who initially spins McAuley to create some space for a shot from 15 yards out.
But McAuley recovered in time with a fine, last-ditch sliding challenge to steer the ball away for a corner, which comes to nothing. Chelsea's best chance so far.
West Brom 0-0 Chelsea
deldude: Thibaut Courtois should be buying the assistant referee dinner tonight. He saved his blunder.
Indeed he did, as Courtois fumbled Salomon Rondon's header over the line, before Rondon was correctly ruled offside.