The full-time whistle goes and Newcastle have pulled off a vital 3-2 victory to pull further clear of trouble. It was a fantastic match which twisted one way and then the other, and the crowd is going crazy with their celebrations.
Chelsea are pushing hard but Newcastle are continuing to battle, and appeals for a penalty are turned away as Frank Lampard's shot crashes into Steven Taylor.
90+1 Moussa Sissoko is given a superb ovation by the Newcastle faithful as he is replaced by Mapou Yanga-Mbiwa for the last couple of minutes.
90 GOAL! Moussa Sissoko is making a name for himself as a Newcastle hero on his home debut as he drills in a ferocious low shot from the edge of the area after good work by Davide Santon, although perhaps Petr Cech could have done better as it was within reach and just beat him for power.
Ramires tries his luck with an ambitious attempt from 30 yards which is wildly slashed high into the stands.
Newcastle are hunting for a late winner here, as Mathieu Debuchy delivers an inviting cross from the right but Chelsea get it clear.
84 Alan Pardew shuffles his pack and brings on Sylvain Marveaux for Yoan Gouffran for the closing stages, before Papiss Cisse lets fly with a wayward shot.
A cheer erupts from the crowd as Frank Lampard blazes a shot over from 20 yards, after davide Santon half-clears a shot from Oscar.
Moussa Sissoko wriggles away from his defender following a slick move, before poking a shot straight at Petr Cech from a narrow angle.
Juan Mata has a shot blocked by Steven Taylor as Chelsea begin to apply some serious pressure in the closing stages.
Newcastle win a corner but Chelsea clear and quickly launch a counter-attack, which Fabricio Coloccini stops in its tracks with a tackle on Juan Mata.
Chelsea win a free-kick in a dangerous position but fail to take advantage as Tim Krul again commands his area to gather the ball.
Ashley Cole has a shot blocked from the edge of the area before Juan Mata floats a poor cross over from the left which Tim Krul easily plucks out of the air.
Tensions are threatening to boil over on the touchline as well, as a foul by Yohan Cabaye on Oscar sparks some angry words from Rafa Benitez.
Moussa Sissoko embarks on a lung-busting run from deep to latch on to a ball that is seemingly a lost cause. He gets the better of Ashley Cole for pace, which is no mean feat, before lashing a powerful shot at goal from a tight angle which forces Petr Cech into a diving save.
It promises to be a thrilling climax now as the St James' Park faithful roar on the Newcastle side.
68 GOAL! Newcastle hit back to make it 2-2 and it is the French connection that does it as Yoan Gouffran sprints away down the left before stinging the palms of Petr Cech. Moussa Sissoko latches on to the rebound and calmly tucks the ball away to draw the scores level.
Sorry again for the technical difficulties. Chelsea have come out all fired up in this second half but Newcastle still look dangerous on the break.
62 Papiss Cisse and Ashley Cole are both cautioned following an off-the-ball incident. Replays show Cisse putting his hands to the throat of the Chelsea man, who squared up to the Newcastle striker in response. Cisse is lucky as referee Howard Webb decides to keep the red card in his pocket.
61 GOAL: Chelsea come from behind to take the lead as Juan Mata curls a stunning shot from the edge of the area past Tim Krul and into the top corner.
55 GOAL: Frank Lampard draws Chelsea level with a tremendous strike from outside the area.
Newcastle win a corner on the right and Cabaye steps up to take it. Taylor climbs to greet it but can't get his head to it. In the aftermath, Cech rises to snatch the ball to safety as Cisse loiters dangerously.
Bertrand tries to pick out Torres with a cross from the left and it's deflected behind for a Chelsea corner. Cahill rises to meet it but can't get his header down on target.
Sissoko makes a strong, powerful charges towards goal but there are three Chelsea defenders on him and he's foiled as he approaches the box. He plants a cross in from the left, trying to pick out Cabaye, but overcooks it.
Coloccini does well to snatch the ball away from Torres on the edge of the Chelsea box. At the other end, Cech collects from a Cahill backpass to subdue a Newcastle threat.
Ivanovic chips a ball to Cole, who tries to find Oscar with a searching pass but Santon intervenes. Santon then rises to meet a Lampard ball from midfield, looking for Ashley Cole.
We're back underway at St James' Park and Oscar gets the ball away from the Toon to start a Chelsea move towards the opposite end. Mata takes a free-kick from range but it's nodded away by Coloccini.
15.53 That's it for this half as it ends Newcastle 1 Chelsea 0. Sorry about the technical disruption! Drop me a line with your thoughts - firstname.lastname@example.org or tweet me @SkySportsRachG.
James Perch earns a booking inside the Newcastle end as the minutes trickle down.
Cabaye's corner falls to Sissoko in the box but his shot gets deflected behind. Another corner on the left is seen away by the Blues' defence.
Debuchy tries to find Gutierrez down the right but Terry cuts it out for a Newcastle throw which the Frenchman steps up to take.
Newcastle firmly on the front foot then after that opening goal. Not good news for Chelsea as they lose Ba - can they come back?
41 A forced change for Chelsea as expected as a shaven-headed Torres replaces the injured Ba.
Santon makes a charge down the left and lifts a teasing cross into the box. Gutierrez is in the right place at the right time to rise with a glancing header that beats Petr Cech.
40 GOAL! GUTIERREZ FOR NEWCASTLE! 1-0
Ba is still off for Chelsea with a taped up face and it appears Benitez might be forced into a change.
There's a chance for Newcastle as Sissoko manahes to slot a ball through the Chelsea defence to Cisse but Cech scrabbles it out with a low diving save.
Play resumes as Ba still receives treatment on the sidelines. It seems it was an accidental clash with Coloccini and Webb doesn't dish out a punishment.
There's a lull in play after what looks like a boot to the face for the former Newcastle man but he's back on his feet after a couple of minutes.
Coloccini tries to hold up Ba as the former tries a run down the right wing. The striker is on the floor after a collision with the Toon skipper after unleashing a shot that goes wide.
It's a free-kick for Newcastle inside their own end after that foul, which Santon takes. He trades passes with Gutierrez at the back as they look for a way through.
30 Ramires slides in with a dubious tackle on Gutierrez, who goes to ground. There's chants of 'off' from the home crowd but he gets away with a yellow from referee Webb.
Gouffran slides through a ball into the box, looking for Cisse who runs to meet it, but Cahill is there to intervene.
On the break, Gutierrez picks out Cisse and they trade a one-two before the former's ball in from the right is hacked away. Ba goes down off Perch in midfield for a Chelsea free-kick.
Debucy cuts out a Chelsea attack to hand the Blues a corner, which Mata steps up to take. He whips it in and Terry rises to meet it but can't get anything on it.
The Toon win a throw deep inside the Chelsea half as the push for a way through. Cahill gets his head to a ball inside the box to clear.
Cabaye tries his luck with a shot from distance but he fires his effort straight at Cech. A powerful shot from Cisse seconds late prompts another diving save from the keeper.
Debuchy lifts the ball forward but it's brought down by Terry. Cole takes a quick throw in the middle of the park and Lampard slots a pass through for Oscar.
So sorry about the technical issues! Hopefully I can keep you updated now. It's still goalless at St James Park. A long Krul ball is nodded on in midfield but Ivanovic snatches it up.
Newcastle are on the ball inside their own half as Perch tries to find a way through to Gutierrez but Lampard intervenes in midfield.
Cole takes a Chelsea throw inside their own half and the visitors trade passes in midfield but Sissoko manages to break.
Newcastle win an early throw but are driven back up the pitch. Getting forward again, Lampard cuts out a ball in from the right by Gutierrez.
Newcastle trade passes at the back and Cabaye slots through to Cisse in midfield, who finds Debuchy out on the left.
We're underway at St James' Park as referee Howard Webb blows his whistle. It's Newcastle seeing the early ball as Sissoko whips in a cross from the left.
St James' Park has filled up fast and the teams come out to a great atmosphere. Enjoy the game guys! Keep the feedback coming at half-time.
@ashleyralph98 - "good line up the blues today 3-1 to chelsea with ba grabbing two and lampard scoring #cfc"
There's a fair few Newcastle fans that have come along in French berets, onion strings etc today as a salute to the raft of January signings from across the channel.
Toby Day - "Hi, very excited for today's match! Supporting the blues!!! My prediction is 3-0 to Chelsea. With Demba Ba going on first, we'll do well."
@mattelondon - "Demba to score a hat-trick and the blues to win 3-2! Come on Chelsea!!! Rafa out!"
The Londoners have seen some of their best form away from Stamford Bridge this season but they visit Newcastle having not won in their last three in all competitions.
A few stats before we get underway... Newcastle are seeking their first win over Chelsea at St James' Park in six games, with the Blues having conceded just one goal across that run.
Jake Backshall isn't too pleased with Alan Pardew's picks this afternoon - "Decent line up for the toon. But why has Perch got another start now Marveux and Obertan are fit? Marveux should be on the left of that front three with Cabaye, Gutierrez and Sissoko in the middle. I would even replace Guiterrez with Anita. Another case of mis tactics by Pardew."
Keep the feedback coming. The teams are out and warming up at St James' Park and the stadium is starting to fill up. It's chilly up here on Tyneside but no rain - fingers crossed!
Here's an update from our friends at Sky Bet - "Don't be late for kick-off as the Blues have opened the scoring more than any other team in the top flight this season. They are 8/11 to notch the first goal and 2/1 to be leading at half-time and full-time. The Magpies are 11/4 to win, with the draw 12/5 and former Newcastle man Demba Ba has been installed as favourite to score first (100/30)."
@JaiRDonaldson - "Hi, hoping for a great match for the toon. Looking strong line up for us! Sissoko should have a key role! 2-1 toon. HTL"
Vladimir Mazurkevich - "Glad to see Ba and Terry in the starting XI! It will boost players confidence and increase their level of determination. Therefore I predict 0-2 win for Chelsea with help of Ba's brace. Come on Chelsea!"
James Wallbridge has written in - "I'm a toon fan, and i'm pretty upbeat for this game! We're gonna have to keep Ba, Mata and oscar very quiet today but chelsea look week in the central midfield whereas we are completely the opposite. Sissoko reminds me a lot of yaya toure or patrick vierra. A big loss for chelsea in the creativity of hazard. I'm pretty confident we can beat chelsea but i'd take a draw. Can't afford to lose as we've got 14 cup finals to try and get to 40 points. I'm going for a brave 2-0 win with Papiss cisse hitting the ball in the back of the net twice!"
@daveysimmaz tweeted - "Newcastle to win 1-0 today. If we can get the lead we'll win it #howaythelads"
Plenty of feedback coming in. Here's what some of you have had to say...
On the Newcastle side of things, new signings Debucy, Sissoko and Gouffran all start as the Toon look to build on their morale-boosting win over Aston Villa in midweek.
Having a look at those line-ups then, Demba Ba indeed starts against his former club on his return to Tyneside, while Juan Mata and Petr Cech are back in the Chelsea line-up.
Chelsea XI: Cech; Ivanovic, Cahill, Terry, Cole; Lampard, Ramires; Mata, Oscar, Bertrand; Ba. Subs: Torres, Ferreira, Marin, Turnbull, Azpilicueta, Benayoun, Ake.
Newcastle XI: Krul; Debuchy, Taylor, Coloccini, Santon; Gutierrez, Perch, Sissoko, Cabaye, Gouffran; Cisse. Subs: Anita, Yanga-Mbiwa, Bigirimana, Elliot, Marveaux, Ameobi, Obertan.
Here come the teams for you then...
While the Magpies can no longer rely on the Senegal international for goals, they will be boosted by an influx of January signings, some of which we're likely to see in action today.
All eyes will be on Demba Ba this afternoon, with the Chelsea striker expected to appear against his old club after moving to Stamford Bridge.
The teams will be coming your way very shortly but first why not drop me a line with your thoughts ahead of kick-off? You can tweet me @SkySportsRachG or email email@example.com.
A very good afternoon all and welcome to our coverage of Newcastle v Chelsea in the Premier League, live from St James' Park.