Chelsea substitute Diego Costa is on a yellow card and kicks the ball away. However, it bangs off the advertising boards and comes back to the Bournemouth defence. He likes walking the line doesn't he?

He's getting involved plenty and some good build-up play from Diego Costa helps win a corner. Willian delivers straight into Artur Boruc's hands again. Strange. 

Image source, AFP

Guess what? Diego Costa has been booked. Only took him 18 minutes as a result of pulling back Matt Ritchie. Have a guess whether he took it without an argument? That's right. No.

Penalty appeal from Chelsea as Diego Costa pulls out to the left, crosses low and watches as the ball strikes the sliding Simon Francis on the arm. 

Image source, Getty Images

Chelsea are biting into tackles now as Cesc Fabregas dispossesses Junior Stanislas. Well played. 

Bournemouth under the cosh now. Diego Costa has just gone piling into Cherries right-back Adam Smith. Looked fairly harmless to be honest. A heavy push, at most. 

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Ex-Bournemouth defender John Williams at Stamford Bridge

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"Chelsea are really piling it on, corner after corner and Willian is at the head of everything they are doing. He is easily their best player"

Another chance for Chelsea. Willian is all over this now, as he pings it out to Branslav Ivanovic, and his cross-shot is steered wide at the near post by the diving Artur Boruc. 

Diego Costa wins a corner and comes close to nodding it in, but Bournemouth clear close to the line. The Cherries hanging on a bit here. 

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Chelsea have started the second half with pace here. The ball is worked out to Pedro on the right and Steve Cook heads clear. But when Willian gets it out on the right again, his cross is whipped in and Nemanja Matic can't get over it from a few yards out. It took a deflection on its way to him, mind. 

Willian is in the number 10 role for Chelsea and drags a shot wide from 20 yards. Never seems to be deterred, though, and has to be one of the first names on the team sheet for Jose Mourinho. 

Image source, Getty Images

As a result of Diego Costa's inclusion, it looks like Pedro has switched to the right and Eden Hazard has moved to the left.

Wonder what Bournemouth centre-backs Simon Francis and Steve Cook think of Diego Costa's introduction? Chelsea are in down the left and Costa takes a swing at the cross. Pedro's overhead kick is easily gathered by keeper Artur Boruc.  

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Ex-Bournemouth defender John Williams at Stamford Bridge

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"Matt Ritchie really got hold of that shot but it drifted wide, however Joshua King is causing problems on the right-hand side."

Back up the other end, Baba Rahman wins a corner for the hosts but Willian delivers it straight into the arms of Cherries keeper Artur Boruc. 

Oooh, this is close. Josh King holds the ball up on the right for Bournemouth, and it's fed back to Matt Ritchie, who lets fly from the edge of the box and it's just wide. 

Image source, Reuters

"Di-e-go, Di-e-go" rings around Stamford Bridge, and the Spanish international is onto a loose ball and fast. 

Bournemouth get us under way for the second half.