FULL TIME: West Brom 2-3 Chelsea
Yacob launches one final ball into the box but Courtois plucks it out of the air to ease the pressure on his side. That should be that.
Five minutes of time added on at the Hawthorns.
Gnabry is trying really hard to upset Chelsea here. He dances past a challenge on the edge of the box and tries his luck from 25 yards out, but Courtois can save easily. Moments later down the other end, Hazard jinks his way into the from the left but drags his shot across goal.
Perdro's debut is over, and Mourinho is issuing a lockdown with John Obi Mikel coming onto replace him.
Serge Gnabry, on loan from Arsenal, looks to make an instant impact having come off the bench, but gets a little over excited and whacks a woeful shot on target into the stands.
West Brom close again! McManaman twists Ivanovic inside out, leaving him on his backside inside the box and tries to curl one into the far corner. He's inches away however, and perhaps someone in a West Brom shirt should have been gambling on that,
BANTER UPDATE: Chelsea's medical team is on the pitch to tend to the fallen Ivanovic. You're getting sacked in the morning etc etc
Rondon swivels and smashes a volley through a crowd of players but it veers just wide.
Matic concedes another foul after a silly push on Rondon. The Serbian, whose already booked too, has had a fairly awful afternoon.
Ooof, Chelsea so close to a fourth! Pedro whips a delicious ball across from the right and Costa connects with a brilliant half volley from a terribly difficult angle, but can only drill his effort wide.
Comeback on?! West Brom pull another back through Morrison, who connects with a brilliant backwards header from an outstanding cross from McManaman. Courtois is rooted to the spot as the ball clips the underside of the bar and goes on.
Tony Pulis has also thrown on Rickie Lambert, replacing James McClean.
Goal! West Brom 2-3 Chelsea (James Morrison)
Costa wins a clever free kick about 25 yards out from goal. Whose good at free kicks at Chelsea these days? Matic takes this one, anyway, but Myhill makes a comfortable save.
Terry takes his sweet time leaving the pitch, whipping his shin pads off in protest. Mourinho acts quickly and brings on Cahill for Willian to fill the void at the back. Rondo's free kick is deflected out for a corner but Chelsea clear.
Terry is gone! He's left in a race with Rondon to a loose ball and hauls down the West Brom forward on the edge of the box. Rondon was the last man and despite the protests, Chelsea's skipper is off!
RED CARD - John Terry
And we are back underway at the Hawthorns, no changes for either side.
HALF TIME: West Brom 1-3 Chelsea
Chelsea's two goal lead is restored. Fabregas dinks a ball over the top and Costa does well to hold off McAuley and knock the ball down for Azpilicueta, who has burst onto the edge of the box from absolutely nowhere. The Spaniard gets a deft touch on the ball and guides it into the bottom corner with Myhill rooted to the spot.
Goal! West Brom 1-3 Chelsea (Cesar Azpilicueta)
Oh Willian. More brilliance from Pedro as he races onto a poor header, rides one challenge as he jinks his way into the box before teeing up the Brazilian for a simple tap in. That he sends wide. Awful attempt.
West Brom move the ball around nicely, working it from right to left but McClean's delivery is plucked out of the air by Courtois. He launches the ball up for a counter but Willian wastes it with a rubbish shot from range.
McClean is booked for a silly challenge on Pedro. Chelsea have the free kick, but it is a bit of a waste.