Last Updated: 07/12/13 5:07pm
What a superb victory for Mark Hughes and his Potters. It was a thrilling second half full of incident but that man Assaidi, on loan from Liverpool, had the final say with a fantastic winning goal. Stoke are up to 12th, while Chelsea slip a spot below Liverpool to third.
Wonderful winner from the substitute! Assaidi's only just come on. He collects the ball in the left channel, cuts infield behind Ivanovic and then fires in an excellent right-foot shot to put Stoke ahead once more. Cue wild, shirt-off celebrations! 3-2.
YELLOW CARD (83) - Walters booked, either for a handball offence or for a two-handed push on John Terry's chest. Rather aggressive from the Stoke man.
Chelsea win a free-kick right on the edge of the box as Hazard feeds Demba Ba, who is taken down by Muniesa.
A sight of goal for Stoke's Muniesa as his shot goes through Terry's legs - but it's wide of Cech's goal. At the other end, Shawcross appears to get away with another piece of very physical defending. It's all fair, insists Mr Moss.
Opportunity for Eto'o to put Chelsea in front once more, but his low shot from inside the area is placed wide of the post.
Demba Ba goes down in the area under Shawcross' challenge as a deep cross comes in but referee Jon Moss is not interested. Looked like a push as Lampard swung the ball in - lucky escape for Stoke perhaps.
Chelsea have had 57% possession in the game so far and they're doing well to keep the ball away from Stoke at the moment.
Frank Lampard and Samuel Eto'o are coming on for Chelsea. A crowd of 25,154 in at the Brit today, by the way.
What a miss from Ireland! Crouch chests down Nzonzi's left-wing cross and sets up Ireland - who was just onside - for a shot from six yards out but he spoons it horribly wide.
There's still the odd sign of hestitation in that Chelsea rearguard between Terry and Cahill, and their goalkeeper Cech. But at the other end, Hazard and Schurrle look threatening every time they're on the ball. Hard to call this game at the moment.
The game has calmed down now after that frenetic start to the second half. Chelsea appear to be finding their passing rhythm once more, which could spell trouble for the Stoke defence.
Good pressure from Stoke but a clear sight of goal just eludes them. Then Wilson does well on the halfway line to prevent a dangerous Chelsea break - he produced a heavy but well-timed tackle on Ramires to clear the ball.
So close for Schurrle! His first shot is blocked but the ball comes back to the Germany international and he curls a shot onto the crossbar. Thrilling stuff at the Brit now.
Mata's free-kick comes off Crouch's thigh and the ball is heading out of the area - but Schurrle sends it back with a crashing left-foot volley that flies in for his second goal of the game. Great response from Chelsea. 2-2.
Walters pushes Azpilicueta over on the right, Chelsea want a foul but Walters escapes and finds Ireland who curls a superb shot towards goal - and it bounces in off the base of the post. What a comeback! 2-1.
Stoke win a corner, prompting a roar of delight from the home fans. Can they trouble Cech again? Not this time... Arnautovic's set piece is cleared at the near post.
Good play from Arnautovic on the left results in Whelan receiving the ball in the 'D' but he's blocked off by Mikel.
As the teams re-emerge from the tunnel, Stoke fan Stein Erik Finne emails in from Bergen in Norway. "Well done to The Potters for coming back into the game," he says. "It's of course going to be very tough for Stoke to hold on to that point, but I for one will keep my fingers crossed for The Mighty Potters!"
A flurry of email feedback arrives. First up, Jon Camberley writes: "Another Cech mistake. He could cost Chelsea a lot of points this season." Brian McCourt says: "Thought we would be in control from the 9th minute after Schurrle scored but Stoke has fought back and surprised me. Jose should bring on Ba for Ramires and change to a 442."
Half-time odds from Sky Bet: You can still get 5/1 on Stoke winning this one. Chelsea are now an 8/11 shout for all three points, while the draw is 15/8.
As it stands, Chelsea are still second but face the prospect of Arsenal extending their lead to six points. Long way to go yet this weekend, though. Stoke are 15th, two points above 18th-placed Crystal Palace.
Some Twitter feedback - Chelsea fan @AshleyRalph98 has got in touch to say: "Yet again no clean sheet for Cech! Poor goalkeeping. We can turn this around... COME ON CHELSEA!"
Jose Mourinho will not be too pleased with his players at half-time you'd have thought. Chelsea looked almost serene after Andre Schurrle's low shot gave the visitors a ninth-minute lead, but a bad decision from Petr Cech on a corner allowed Peter Crouch to equalise for Stoke on 42 minutes.
It's a poor piece of goalkeeping from Petr Cech as he came to try and claim a corner-kick delivery from Arnautovic that he was never going to reach. Crouch keeps his head and sees his low shot from six yards go through two pairs of legs (Ramires and Cech) and in for the equaliser. It's Crouch's second Premier League goal of the season, and fourth in all competitions. 1-1.
Another good chance spurned by Ramires. Muniesa almost gave away a penalty but just nicked the ball away from Ivanovic in the box.
Stoke fans were appealing for a free-kick just before that Ramires chance when Ivanovic bundled over Arnautovic on the flank.
Ramires shoots at Begovic when he could have passed left to Torres or right to Schurrle. The effort was tame.
Chance for Stoke - Walters heads wide at the far post after a deep left-wing cross by Arnautovic. The Republic of Ireland international nodded the ball down but Cech was relieved to see it bounce harmlessly wide.
Chelsea are in total control, but they're not looking hugely fluent in attack. They've had about 56% of possession so far.
After good work by Hazard, Mata plays the ball into the right side of the area for Torres who pulled it back sharply - but there were no blue shirts in the right position.
Torres heads away Arnautovic's dangerous corner kick. Stoke are mounting attacks well enough but Chelsea look thoroughly competent in dealing with them.
Hazard slides a pass across the area from the left side for Torres after Chelsea seized upon a Stoke mistake, but the ball was too far in front of the Spain striker.
Fine move by Chelsea ends with Ivanovic wastefully attempting a shot from out wide on the right - the ball went for a throw!
Chelsea looking very comfortable midway through this first period, with that advantage given to them by Andre Schurrle.
Chance for Stoke there as Adam did well in the box (his final act) before the ball was played back to Whelan, whose shot hit his team-mate in the face and therefore missed the target.
Scrap that, looks like Adam is going to have to come off after all. Ireland will be the man to replace him.
Charlie Adam is walking a little easier now, and it looks like he'll be OK to continue. Chelsea have a free-kick wide left... Mata ends up having a shot straight at Begovic.
The Chelsea fans chant Jose Mourinho's name as Stoke attempt to mount an attack. Nzonzi picks out Cameron on the right but the Blues win the ball back and break.
Schurrle is proving so dangerous, popping up most often on the right where he's trying to deliver balls into Torres.
Mikel passes forwards to Schurrle, whose ball control is excellent and Shawcross can't be sure which way he's going. The German then strikes a low accurate shot which goes past Begovic and in for his second goal of the season. Great start for the visitors. 0-1.
Referee Jonathan Moss awards Chelsea a free-kick for a foul on Ramires by Adam, who is now limping heavily.
Hazard impresses with some trickery on the left but his powerful cross flies straight into Begovic's gloves.
First real chance of the game falls to Ramires as Schurrle charges into the right side of the box and passes back for the Brazilian - but he shins his shot over.
Cahill brings the ball downfield and Schurrle finds Torres in the box - it's a corner to Chelsea, but Crouch clears Mata's delivery.
A nice turn in midfield from Arnautovic as the teams begin to find their feet - both in home kits today.
A minute's applause is being held as fans, players and officials remember the great Nelson Mandela, who died this week.
Stoke will be desperate to improve their woeful Premier League record against Chelsea. The hosts have not breached Chelsea's defence since April 2011 and are yet to beat them in 10 Premier League attempts, eight of which they've lost. The Blues dished out a hefty 4-0 defeat on the Potters on their own turf last season, although Stoke striker Jon Walters contributed two own goals.
Last bit of feedback before we begin from Daniel Sibanda on email: "I expect Torres to shine in a game that looks set to be full of physical football. 4-1 to the mighty Blues with a Torres brace!"
John Terry leads Chelsea out at the Britannia Stadium on the occasion of his 33rd birthday. We'll be underway at Stoke very shortly...
A bit more from Jose Mourinho now as the teams prepare to emerge from the tunnel: "Even if we win, maybe Arsenal win tomorrow and go to four (points gap), or draw and go to two. We need to find consistency in performances and results. All teams will lose points, but we want to keep improving on performances."
Willie Maher has emailed in to say: "The Chelsea defence has leaked a lot of goals in their last two matches and I think they will have worked on that in training this week. I really can't see Stoke scoring today. As a result, I'm going 2-0 Chelsea! Torres to make amends for those misses against Sunderland! Two for him..."
Here's Jose Mourinho talking pre-match: "I still have a match on Wednesday that's very important for us because we want to finish first in our Champions League group. I need a fresh Frank Lampard for that game against Steaua Bucharest. Willian is ill, that's why he's not in the list. We do not want to risk Oscar. We need everyone available for the busy schedule."
Here's some of your pre-match thoughts. First up via email is Cymonn O'Shea who says "I think Chelsea will win 2-0... interesting that Willian isn't even on the bench." Meanwhile, Nafiul Islam writes: "I think it will be 3-1 to Chelsea with Eden Hazard scoring an hat-trick."
Speaking ahead of kick-off, Chelsea full-back Cesar Azpilicueta says: "We're away again in a difficult stadium and Stoke are physical, but we're going to try to play our game and our football. Being in second position, our target is to go game by game, to fight and try to win, and be better as a team."
You can get 5/1 on Stoke to win today with Sky Bet, while Chelsea are priced up as firm favourites at 8/15. The draw is a 16/5 shout. Where's your money going?
I want to hear your thoughts ahead of kick-off - on the starting line-ups, any predictions, or whatever takes your fancy - so email me at email@example.com or tweet me at @jonboy79.
Similarly, Mark Hughes also makes two changes after Stoke drew 0-0 at home to Cardiff in midweek. Marc Muniesa starts at left-back and Jonathan Walters is restored to the team. Oussama Assaidi drops to the bench, while the injured Erik Pieters is not involved. He is understood to have a groin problem.
Jose Mourinho has made two changes to the Chelsea team that started the 4-3 win at Sunderland on Wednesday. Andre Schurrle and John Obi Mikel come in. Frank Lampard drops to the bench, while the poorly Willian is not involved today.
Chelsea team: Cech; Ivanovic, Cahill, Terry, Azpilicueta; Ramires, Mikel; Hazard, Mata, Schurrle; Torres.
Stoke team: Begovic; Cameron, Shawcross, Huth, Muniesa; Walters, Nzonzi, Whelan, Adam, Arnautovic; Crouch.