Steve Cook was the unfortunate defender who helped home Pedro's shot but it makes little difference - the Cherries were well beaten and Chelsea go marching on.
- Kick-off: 15:00 GMT
- Pedro & Fabregas start for Chelsea
- Ake ineligible to play for Bournemouth
Chelsea have the last word, with Pedro running at the Cherries defence and then seeing his shot take a huge deflection before rolling into the net.
Harry Arter tries his luck from distance for Bournemouth, but it is easy for Thibaut Courtois.
Simon Cook makes a vital interception as Chelsea look to break again, cutting out Pedro's pass to Eden Hazard.
There will be three minutes of added time - but to all intents and purposes this game finished a long time ago.
Antonio Conte leads the applause for Victor Moses as he leaves the field. Ola Aina is coming on for the final few minutes.
Chelsea look content to keep Bournemouth at arm's length in the closing stages here, and they are doing it very effectively. Bournemouth have not even had a sniff since that Benik Afobe chance and they have very little time left to change that.
Chelsea are cruising at home to Bournemouth, but the away side have actually had more possession than their lofty hosts, now nine points clear at the top of the league (with Liverpool still to play later of course).
The Cherries have been neat, tidy and maybe too nice?
Harry Arter, Jack Wilshere and Adam Smith each had 100% passing accuracy in the first half, but that's now dropping south of 90% as Eddie Howe's side begin to realise they must take more risks.
Not much happening in this game now - Bournemouth look beaten. Chelsea look comfortable.
Still time for another Chelsea change, though - off comes Willian and on comes Nathaniel Chalobah.
BBC Radio Five Live football reporter
It's going to take almighty effort from Bournemouth to get anything from this game now.
Bournemouth's final change sees Jordon Ibe on for Brad Smith.
Chelsea continue to let the visitors have the ball, then hit them on the break.
Bournemouth chances have been few and far between since the break but Thibaut Courtois comes to Chelsea's rescue here, rushing from his goal to block Benik Afobe's shot with his legs after the Cherries substitute ran clear.
Chelsea want another penalty here, after another quick-fire break.
Eden Hazard turns inside Steve Cook and hammers the ball at Dan Gosling. It does hit his arm, but from point-blank range, and he could not exactly do much about it. Referee Mike Jones feels the same way and awards a corner instead.
Pedro fires wide for Chelsea from the edge of the area and Bournemouth boss Eddie Howe has seen enough.
A double change for the Cherries sees Andrew Surman replaced by junior Stanislas and Benik Afobe on for Joshua King
Not much bad news about for Chelsea so far today, but here is some: Pedro is booked for a tackle on Harry Arter and he will be suspended for their next match, against Stoke on New Year's Eve.
Chelsea are looking dangerous every time they come forward. A quick break sees Eden Hazard work the ball out to Willian, who is denied by a sharp stop from Artur Boruc.
The resulting corner is cleared as far as Victor Moses, who sees his dipping shot from the edge of the box bounce a yard or two wide.
Alasdair Wildman: In Hazard and Costa Chelsea have two match winners. If one is missing the other steps up
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Another Chelsea attack, this time featuring a dangerous low cross from Willian, who fizzes it across the six-yard box from the right. Again, Pedro is lurking but Artur Boruc is down sharply to collect.
More from Chelsea, and more from Eden Hazard, who is finding a lot of space out on the left. He cuts inside but cannot find a finish, seeing his shot slice away from goal and from his team-mate Pedro, who was arriving at the far post.
Chelsea come forward again, and look menacing again. The ball comes over to Marcos Alonso on the right of the box but he cannot make a decent connection and his first-time effort is well off target.
Eden Hazard steps up to take it himself, sending Artur Boruc the wrong way as he confidently rolls it into the opposite corner of the net.
Eden Hazard runs at Simon Francis, who sticks out an obliging leg...
Bournemouth striker Joshua King has not had much change out of David Luiz so far today. He gets the better of him here, on the edge of Chelsea'a area, but Gary Cahill is in the right place to cover.
Bournemouth get the second half started at Stamford Bridge.
A picture to warm hearts on Boxing Day.
Antonio Conte and his senior players took time off from Chelsea's Premier League title chase to give the club's under-8s a Christmas present to remember.
Good to see.
You can't win the league at Christmas. But you can open up a nine-point gap. And Chelsea are on the way to doing exactly that.
I'm never normally a fan of the short corner but Chelsea worked one especially well for their goal. Cesc Fabregas (4) took it short and then quickly found himself on the edge of the area to find goalscorer Pedro (11) with a lovely little pass through. Deadlock, broken.
Adam Smith steps up... and fires the ball straight into the wall. Chelsea clear their lines not once, not twice, but three times and the one minute of added time at the end of the first half is almost up...
Chelsea are not happy here, as referee Mike Jones plays an advantage after Gary Cahill fells Jack Wilshere on the edge of the area, then calls play back after the Cherries fire the ball over the bar seconds later.
The end result is free-kick for the visitors, in a pretty promising position...
BBC Radio Five Live football reporter
Bournemouth have done themselves real credit in this first half - Jack Wilshire pulling the strings - but Eden Hazard has been outstanding for Chelsea which has made the difference.
Bournemouth are seeing plenty of the ball, but they have to be careful because Chelsea are constantly looking to pounce on the counter-attack.
The Cherries had half-a-shout for a penalty on their last attack, when Adam Smith ran into Nemanja Matic inside the area. Referee Mike Jones felt it was an accidental collision, however, and the replays I've seen back that up - hard to blame Matic there.
Cesc Fabregas takes the free-kick and curls it over the wall... but sees the ball skim the bar and land on top of the net. Close, but not close enough. A great effort, mind.
Tor Noppharat: Dunno whether that was intentional by Pedro. But it was a really nice Christmas present!
Steve Howes: Pedro, beautifully worked goal with bournemouth trying to smother defence
Deldude: One word for Pedro's goal genius
Eden Hazard is in the kind of mood where he is a real handful. He swivels away from Simon Francis on the edge of the Bournemouth box and is sent sprawling by the Cherries defender. That's a Blues free-kick, in a dangerous area...
This game has really got going now. Bournemouth again go close to an equaliser when Nemanja Matic heads away a free-kick but only as far as Jack Wilshere, who sees his volley deflected wide by Cesar Azpilicueta's outstretched foot.
Ok, this is pretty good. It wouldn't have counted, because the whistle had gone but Eden Hazard just tried his luck with a rabona from the edge of the area after a quick Chelsea break looked like it had petered out. Artur Boruc makes the save in any case, but for a non-goal when play had stopped, it was up there.