Djenepo is late getting across to Azpilicueta, and he clips his ankles to take his legs out from under him which earns him a late yellow card.
90' +3
Still, Chelsea are keeping the ball and Southampton just can't get out of their own half. They're dropping deeper to try and close down the space, but the hosts are patiently working their way upfield.
90' +1
M. Salisu gets yellow.
Salisu catches Werner with a late challenge when he tries to stop his run down the right and he's shown a yellow card.
89'
B. Chilwell has scored a goal for Chelsea!
CHILWELL SCORES! Lukaku fires a shot on goal from close range that bounces off the post before Azpilicueta fires a shot against the crossbar. It falls to Chilwell on the left of the box, and it looks like McCarthy kept him out too, but he did so from behind the line. 3-1 Chelsea!
87'
M. Elyounoussi enters the game and replaces N. Redmond.
Final change for Southampton now and it's Elyounoussi that's coming on for Redmond.
84'
T. Werner has scored a goal for Chelsea! Assist by César Azpilicueta.
WERNER SCORES! He had one disallowed in the first half, but this one will count! Azpilicueta gets in behind Walker-Peters and squares the ball into the six-yard box. Southampton aren't alive to the danger and Werner is following in to tap it past McCarthy. 2-1 Chelsea!
Walker-Peters just didn't pick up Azpilicueta's run down the right and he has the space to put a dangerous cross into the six-yard box.
83'
R. Barkley enters the game and replaces R. Loftus-Cheek.
Final roll of the dice for Chelsea now as they try to find a late winner. Loftus-Cheek is taken off, with Barkley on to replace him.
79'
Chelsea are straight on the attack and they're trying to use their man advantage here. Loftus-Cheek lifts a deep cross into the box, with Lukaku hovering at the far post, but McCarthy comes off his line to collect it.
77'
J. Ward-Prowse goes off after a red card!
IT'S RED! After looking at the replays of Ward-Prowse's tackle, Martin Atkinson has gone back onto the pitch and shown the Southampton captain a straight red for serious foul play. He hands the armband over to Romeu, and the Saints are finishing this game with 10 men.
Minute
Description
73'
M. Djenepo enters the game and replaces N. Tella.
Jorginho enters the game and replaces M. Kovačić.
Southampton are making a change here as well, with Tella going off for Djenepo.
Second change for Chelsea now and it's Jorginho that's coming on for Kovacic.
70'
Walker-Peters squares the ball to the edge of the box, but there are two Southampton players waiting for it. Tella and Armstrong both try to hit the shot and it ends up rolling harmlessly back to Mendy.
68'
Chelsea are patiently working their way upfield and Mount turns Diallo before knocking it out to Azpilicueta. He can't find the space for a cross though and only wins a throw-in.
65'
M. Mount enters the game and replaces C. Hudson-Odoi.
Chelsea are making their first change of the game now as Mount comes on to replace Hudson-Odoi.
61'
Penalty goal scored by J. Ward-Prowse for Southampton!
WARD-PROWSE SCORES! The captain steps up to take the spot-kick and confidently fires them level! It's a good penalty from him as he gets a lot of power behind it and picks out the bottom-right corner. Mendy dived the wrong way and it's 1-1!
57'
There are big shouts from the crowd for a penalty after Chilwell is clumsily brought down by Bednarek. It looks like a coming together more than anything though and the referee waves him back to his feet.
55'
Thiago Silva gets yellow.
It's a late challenge from Silva on Redmond, and he's shown a yellow card.
54'
The visitors can't clear their lines from a corner and it comes to Chilwell at the byline. He does well to keep it in play, but the offside flag goes up against him before he can clip a cross back into the crowd.
52'
Southampton are still trying to press Chelsea high upfield, but they just can't get close to the hosts at the moment. Tella almost intercepts a pass back to Chilwell, but can't get enough on it to win back possession.
50'
Ward-Prowse steps in to nick it off Hudson-Odoi and sets Southampton on the counter. He switches it out to Tella on the left, but his cross takes a deflection off Silva which just takes it away from Armstrong.
48'
Hudson-Odoi just turns away from Bednarek before squaring it to Werner on the edge of the box. He takes it away from Salisu with his first touch before drilling a low shot on goal, but it's held onto by McCarthy.
46'
I. Diallo enters the game and replaces T. Walcott.
Chelsea get us back underway for the second half!
There's a change for Southampton at the start of the second half as Walcott makes way for Diallo.
45' +3
HALF-TIME: CHELSEA 1-0 SOUTHAMPTON.
45' +1
Southampton break quickly on the counter again and Tella makes a great run down the left, but his cross is blocked by Chalobah. He gets a second attempt at it, but it's another poor attempt that's cleared by Silva.
44'
Tuchel is furious with the decision to disallow the goal and he's making his feelings known on the sidelines. The referee goes across to him and the Chelsea manager is booked for his reaction.
38'
A clever bit of footwork from Loftus-Cheek gets him away from Ward-Prowse before Azpilicueta switches it out to Kovacic. He pulls it back for Werner, and he hits the shot first time, but it's well-blocked by Romeu.
34'
Oriol Romeu gets yellow.
Romeu sticks out a leg to trip Kovacic after the ball is knocked past him and he's shown the first yellow card of the game.
32'
Another sloppy pass from Southampton allows Chelsea to break on the counter, with Loftus-Cheek leading the way through the middle. He has Werner making a good run to his right, but the throughball is cut out by Walker-Peters.
30'
Chilwell takes the corner short this time before getting it back off Kovacic. He cuts into the box and goes for goal himself, drilling a low shot towards the near post, but McCarthy holds onto this one.
28'
Redmond has space to cut into the box, but he plays it forward for Walker-Peters instead. He floats a good cross into the near post, but once again, can't pick out a team-mate as Chelsea clear their lines.
24'
Hudson-Odoi is causing Southampton all sorts of problems down the left here and he initially does well to hold off Bednarek. He knocks it past the defender to try and carry on his run before being bundled to the floor.
22'
Chelsea go straight down the other end and Werner cuts inside before seeing a shot blocked by Walker-Peters. It falls nicely for Loftus-Cheek, who hits it on the volley, and sends it just wide of the near post.
20'
Walcott does well to hold off Chilwell as he waits for support to join him. He squares it to Armstrong just outside the area, and he takes the shot early, but Mendy gets down to save it at his far post.
17'
There are some nervy moments at the back for Chelsea again as the Southampton forwards are still pressing them high upfield. Armstrong closes down Mendy this time before the hosts win a free-kick when Tella gets too close to Chalobah.
15'
It's a poor corner into the box for Southampton which is cleared at the near post by Silva, but it falls to Walcott. He's a long way out when he hits the shot on the volley, but his wild effort flies straight into the stands.
13'
Mendy's clearance is gifted straight to Romeu, and he slides a good throughball into Armstrong. He can't open up the space for a shot, so lays it off to Walcott, but his cross is put out for a corner off Rudiger.
11'
Kovacic switches play out to Azpilicueta on the right, and he curls a great ball into the box for Lukaku to run onto. He has Bednarek tight to him though and the defender blocks his first-time shot.
9'
T. Chalobah has scored a goal for Chelsea! Assist by R. Loftus-Cheek.
CHELSEA LEAD! It's a good corner from Chilwell into the box that's flicked on by Loftus-Cheek in the middle. Chalobah is unmarked at the far post and he stoops to get on the end of it, nodding his effort into the back of the net before McCarthy can react. 1-0 Chelsea!
None of the Southampton defenders are picking up Loftus-Cheek on the corner, and he rises high to flick it towards the far post.
7'
Tella nicks the ball off Werner on the halfway line and strides forward through the middle before running into Rudiger. He sets Hudson-Odoi on the counter and he tries to switch it out to Chilwell, but they're not on the same wavelength and he gifts it back to Southampton.
4'
Azpilicueta plays the ball back to Mendy and Redmond is sprinting across to the keeper to close him down. He almost nicks it off him, but the keeper keeps a calm head to take it around him and clear his lines.
2'
Southampton have started brightly and are helped by some sloppiness at the back for Chelsea. Rudiger's clearance goes straight to Tella, who slides it through to Walcott, and they win a free-kick when he's tripped by Hudson-Odoi.
1'
Armstrong gets the game underway for Southampton!
Hello and welcome to live coverage of the Premier League meeting between Chelsea and Southampton at Stamford Bridge!
After making a good start to the season, Chelsea have now lost their last two matches in all competitions, being seen off 1-0 by both Manchester City and Juventus, and Thomas Tuchel will be hoping to get back to winning ways today. As for Southampton, they're still looking for their first win in the Premier League this season (D4 L2). They lost their last outing against Wolves, which ended a run of four draws for the club in the competition.
CHELSEA STARTING XI (3-5-2): Edouard Mendy; Cesar Azpilicueta, Thiago Silva, Antonio Rudiger; Callum Hudson-Odoi, Ruben Loftus-Cheek, Trevoh Chalobah, Mateo Kovacic, Ben Chilwell; Romelu Lukaku, Timo Werner.
CHELSEA SUBS: Ross Barkley, Saul Niguez, Jorginho, Hakim Ziyech, Kai Havertz, Marcos Alonso, Andreas Christensen, Kepa Arrizabalaga, Mason Mount.
SOUTHAMPTON STARTING XI (4-4-2): Alex McCarthy; Valentino Livramento, Jan Bednarek, Mohammed Salisu, Kyle Walker-Peters; Theo Walcott, Oriol Romeu, James Ward-Prowse, Nathan Tella; Nathan Redmond, Adam Armstrong.
SOUTHAMPTON SUBS: Fraser Forster, Mohammed Elyounoussi, Romain Perraud, Stuart Armstrong, Shane Long, Lyanco, Che Adams, Moussa Djenepo, Ibrahima Diallo.
The teams are out on the pitch now, with kick-off just moments away!
It's been a good reaction by Chelsea after their recent results, but Tuchel, who was frustrated by the disallowed goal, will think they should be further ahead. Southampton have had a couple of good moments going forward, but they need to be more clinical with the chances they do create if they want to get back into the game.
That win takes Chelsea top of the table for now, with Liverpool and Manchester City playing each other tomorrow. Next up for them is a trip to Brentford after the international break. Southampton are still looking for their first win of the season and face Leeds United in their next game.
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