WBA XI: Johnstone, Furlong, Bartley, Ajayi, O'Shea, Townsend, Pereira, Livermore (C), Saywers, Diangana, Robinson.
Subs: Button, Robson-Kanu, Phillips, Harper, Edwards, Kipre, Field.
Chelsea XI: Caballero, James, Christensen, Thiago Silva (C), Alonso, Kante, Kovacic, Mount, Kavertz, Abraham, Werner.
Subs: Kepa, Jorginho, Barkley, Tomori, Giroud, Hudson-Odoi, Azpilicueta.
Hello and welcome to our coverage of today's Premier League clash between West Brom and Chelsea, live from the Hawthorns.
KICK OFF: We're underway at the Hawthorns. Chelsea are donning their questionable red and blue striped away kit.
Interesting to note that Frank Lampard has selected Thiago Silva as his captain today, despite it being his Premier League debut and the fact that he can barely speak English.
GOAL! What a strike from Callum Robinson! Alonso's sloppy header infield allows Pereira to feed Robinson out wide left. He has a lot to do but strikes it superbly left-footed into the bottom right corner past Caballero! Chelsea are rocked.
Chelsea have a free-kick around 30 yards out, shooting position, but Mount's effort hits the wall.
Booking: Not a great start for Alonso, who is booked after pulling back Ajayi. Alonso was straight up beaten for pace, despite being given about five yards head-start.
MISS! James does well on the right to deliver an excellent ball across the face of the goal, beating two West Brom defenders. It pops up for Abraham at the back post but his side-footed effort goes over the bar. Big chance, big miss.
Moments ago, Sam Johnstone made a solid effort from Kai Havertz's shot from range. It was at a nice height for the goalkeeper but he still had to stretch for it.
Crossbar! Mount does well to beat O'Shea before breaking into the box and squaring it for Werner. Werner seemingly can't miss but his shot hits the crossbar. Chelsea are pushing here and should be level.
Kovacic plays a decent ball forward for Werner but Bartley does well to marshal the defender and eventually win a goal kick.
Stat: Robinson's opener means that Chelsea have only kept one clean sheet in 21 Premier League away games under Frank Lampard.
Chelsea attack yet again. They work it out wide right to James, who gets into the box, but his low fierce cross is turned into Johnstone's hands by Mount. Good defending from Bartley to put pressure on Mount.
GOAL! What is Thiago doing?! That's suicidal defending from the Brazilian, who has practically gifted West Brom a second goal. He fails to control an easy pass and Robinson is clean through on goal before slotting easily past Caballero. 2-0.
Booking; The referee goes back to an earlier incident and books Reece James for late foul.
GOAL! IT'S THREE! Chelsea are absolutely rattled. Bartley snicks in at the back post to finish off a nice corner routine. Where was James? He was unmarked.
Chelsea just seem to have lost their confidence here. West WBA have a free-kick on the right, Pereira is over it...It's a decent ball, but Thiago Silva clears ahead of Caballero inside the six-yard box.
10 minutes of the first half to go. Slaven Bilic must be in dream land.
Miss! Another chance for Tammy Abraham but he balloons his effort over. He's got to do better there. I wouldn't be surprised to see Giroud on early in the second half.
Chance! Sawyers does well to cut the ball back for Diangana but his curled attempt goes over.
There will be two minutes of added time.
KICK OFF: We're back underway. There's a double change for the Blues to report on.
Substitution: Alonso and Kovacic are off for Azpilicueta and Hudson-Odoi.
HALF TIME: Three shots for the Baggies. Three goals for the Baggies. Who would have expected this?
Chelsea look to have started the half with purpose and intent and have had pretty much all of the ball in the opening five minutes of the half. That said, Chelsea will need to do a bit more to break down the Baggies' defence.
GOAL! Chelsea pull one back. It's Mount from range. Johnstone doesn't move an inch and should be doing better. Comeback on?
Mount touches the ball to Havertz just inside the box, he swings a leg at it, but it deflects off Livermore and Johnstone has to scurry across to parry for a corner!
That's more like it from Thiago Silva. Diangana threads a through ball for Townsend, and it would have him through on goal, but Silva does superbly to get down and intercept, last ditch stuff.
Substitution: Robinson won't have the chance to complete his hat-trick as he's replaced by Hal Robson-Kanu.
GOAL! Hudson-Odoi scores! Werner has it on the left, feeds Hudson-Odoi, and he plays a lovely one-two with Havertz in the box.
Receiving it back, Hudson-Odoi slots a fine effort into the far right corner past Johnstone! The Chelsea comeback is well and truly on!
West Brom will be nervous now. Having been 3-0 up, they're at real risk of blowing that lead. It's likely to be all Chelsea for the final 20-odd minutes. And you feel they'll manage to at least find one more.
Substitution: Chelsea are looking to find the leveler. Giroud is on for Thiago Silva.
Substitution: Grady Diangana makes way for Matty Phillips, West Brom's second change of the game.
West Brom need to hold on for 10 more minutes. They've been slightly better in the last few moments but there's very little out ball for the midfielders or defenders to pick out, meaning Chelsea just keep coming back with another attack.
Booking: Furlong is booked for apparent time-wasting while taking a throw in. I'll be honest, that seems a bit harsh from referee Moss.
Pereira does well to win a free-kick after being fouled by James. It's a chance for West Brom to put bodies into the box but Phillips's delivery is over hit. Waste. Chelsea will come again.
Booking: Christensen is booked for a late challenge on Robson-Kanu which prevents a West Brom counter. The Baggies won't mind, it breaks the play up and gives them a chance for a breather and eat up a few more seconds.
Chance! Timo Werner strikes from range. There's a bit of power on it but it bounces just before reaching Johnstone who makes a comfortable catch in the end. Not the best game from Werner today. Still time for Chelsea to find an equaliser...
There will be five minutes of added time, music to Chelsea's ears.
Substitution: Sam Field is on for Pereira for the closing stages and West Brom look to hang on.
GOAL! Chelsea find an equaliser! Tammy Abraham taps in after a well worked corner which West Brom failed to deal with. What a game!
FULL TIME: It is the first draw of the Premier League season! What a match. The points are shared at the Hawthorns.