Southampton have produced a spirited performance to hold Chelsea to a goalless draw in Wednesday's Premier League fixture at Stamford Bridge.
Chelsea had been looking to re-open their five-point advantage over fifth-placed Arsenal, but the Blues struggled against a well-organised Saints defence.
Eden Hazard had a chance in either half, but Southampton were full value for their point and first clean sheet in the top flight in 11 attempts.
Find out how all of the action unfolded in West London courtesy of Sports Mole's minute-by-minute updates below.
9.43pmThat will be all from Sports Mole for this game. Thank you for joining us this evening and we hope to see you again soon. Goodbye for now.
9.42pmThe full-time whistle goes at Stamford Bridge and Chelsea and Southampton have played out a goalless draw. The home side never really progressed out of second gear and in the end, Southampton were fully deserving of their point.
FULL TIME:
SHOT!
90+3 minAlonso is closer this time and finds the target, but Gunn makes a comfortable save. That could be that.
SHOT!
90+2 minSuch is Chelsea's desperation that Alonso attempts a shot from 35 yards out. You guessed it. It doesn't come close to beating Gunn.
90 minThere will be four minutes of added-on time.
89 minSUBSTITUTION! Another alteration for Southampton sees Austin replace Armstrong.
87 minLoftus-Cheek takes it upon himself to try to weave his way into the penalty area, but Yoshida makes a super tackle to deny the England international. Just the three minutes to go.
85 minSoares has picked up what appears to a knock to his knee. He is able to hobble off but it is unclear whether Hasenhuttl will be forced into a change.
83 minThis game is starting to peter out ever so slightly. Chelsea just aren't doing enough when they have the ball.
81 minSouthampton certainly aren't settling for a point. The visitors break forward down the right through Valery, but the youngster's cross is over-hit and Soares cannot do anything with it on the opposite flank.
YELLOW CARD!
79 minRomeu is booked for a cynical shirt-tug. The referee wastes little time in dishing out his yellow card.
CHANCE!
78 minMorata should do a lot better here. The Spaniard is found on the left-hand side of the penalty area but despite having just Gunn to beat, a tame shot is fired straight at the goalkeeper.
76 minThe frustration in this Chelsea side is building. Luiz fails to get on the end of a set piece and the Brazilian is quick to show his anger.
YELLOW CARD!
74 minRudiger picks up a yellow card for Chelsea after barging into the back of Long.
73 minChelsea are attempting to play a lot faster but so far, Southampton are dealing with everything that comes their way.
DISALLOWED GOAL!
71 minAs i say that, Chelsea have the ball in the back of the net after Morata receives a Fabregas pass and sends the ball past Gunn, but the assistant's flag goes up. It's extremely tight.
70 minI'm not so confident that we are going to get any goals in this match. Chelsea just can't get going in the final third. They may need something special from Hazard or a set piece to break down this Southampton defence.
68 minSUBSTITUTION! Chelsea's second change sees Fabregas replace Barkley.
SHOT!
66 minJorginho gets into a position to get an effort away from around 25 yards out, but his rising shot is straight at Gunn.
65 minSarri has sent Fabregas out to warm-up. The playmaker normally comes on for Jorginho but given Chelsea's lack of options, don't be surprised to see Barkley taken off.
63 minThe Saints now win a free kick on the edge of the area. Ward-Prowse takes responsibility for it, but the shot goes into the wall.
SHOT!
61 minSouthampton get forward and the ball is only half-cleared to the edge of the area where Romeu is waiting. The former Chelsea man shoots first time but Arrizabalaga makes an easy save.
61 minWe are through an hour in West London. Chelsea are still having their moments, but this has not been a good performance from the home side. Southampton continue to hold their own.
SHOT!
59 minIs this a sign of things to come? Hazard picks up the ball on the left, cuts inside and sees a well-struck effort towards the near corner diverted behind by Gunn.
58 minChelsea spark into life but they can only win a free kick around 25 yards out. This is in Luiz range, especially with Willian off the pitch. However, it is fired straight into the wall.
56 minYou wouldn't go as far as saying that this game is simply drifting along, but neither side look that lively on the ball. Chelsea need to go up a couple of gears.
54 minChelsea are seeing more of the ball but they still look short of ideas. A draw would be a great result for the visitors, but maybe there is an opportunity to achieve more.
52 minThe home supporters are trying to lift their side. Sarri will hope that these 11 players can work together to put his side into the lead because there are very few alternatives on the bench.
50 minYou have to say that Southampton are having the better of the early stages of the second half. The Saints win a free kick in a threatening area, but Chelsea survive with a foul being given on the edge of the box.
SHOT!
47 minSouthampton have gone straight onto the attack and have already managed to force Arrizabalaga into action. I'm not sure that Armstrong's 20-yard curler was going to find the far bottom corner, but the Spanish stopper still tipped the ball away for a corner.
46 minSUBSTITUTION! Southampton have decided to make a change at the break with Long being introduced for Ings.
KICKOFF:
8.41pmI mentioned earlier that there had been no goals in any of the other matches. Well, things have changed considerably. Click here to take a look at our live scores section.
8.36pmThe half-time whistle goes at Stamford Bridge and we remain goalless. It has not been the greatest 45 minutes of football with only Hazard's effort coming close to breaking the deadlock.
HALF TIME:
45 minThere will be two minutes of added-on time.
44 minSouthampton have gone one better, managing to regain possession and launch an attack. However, Valery's cross is comfortably cleared.
42 minThere has been a greater spring in Chelsea's step since Loftus-Cheek's introduction. Expect Southampton to go ultra defensive in these closing stages or else all of their hard work and discipline has been for nothing.
SHOT!
40 minBest move of the move. Chelsea string together several passes from right to left and Morata is provided with the chance to get a first-time shot away from around 12 yards out. However, Soares gets across to deflect the ball wide.
39 minLoftus-Cheek is lining up on the right flank, leaving Barkley to remain as a left-sided central midfielder. It will be interesting to see if the substitute stays out wide. Chelsea cannot afford to become too narrow.
37 minSUBSTITUTION! Yet another injury to an attacker. The change takes place with Loftus-Cheek being introduced.
36 minWillian is clattered by Yoshida and it has led to some treatment for the Brazilian. The playmaker doesn't look happy at all and is walking gingerly having got back to his feet. I think Loftus-Cheek is being readied...
CHANCE!
34 minFinally, a clear-cut chance. A long ball picks out the run of Hazard who controls the pass beautifully. The Belgian should score from 10 yards out, but Gunn stays big to make a fine save.
33 minBednarek does the same to Hazard just a couple of minutes later. That was risky. Chelsea are still dominating the ball.
YELLOW CARD!
31 minBednarek goes into the book for a late challenge on Morata on the halfway line. Good decision from the referee.
29 minSee the previous post. Parts of tonight's game have felt like a training session, especially for Chelsea. Maybe this is Sarri's way of protecting his players against further injuries.
27 minChelsea have started to control possession again but when they take the measured approach, they are not really hurting Southampton. The Saints front three are equally not offering much at the other end.
25 minBetter from Chelsea who take the direct approach down the right. Willian eventually receives the ball and cuts inside, but his goalbound effort is well blocked by a defender.
23 minWe are still awaiting a goal in any of the six Premier League fixtures this evening. Maybe it is going to be one of those nights...
21 minThe last two minutes have been fairly quiet with both teams choosing to keep hold of the ball. There is still space available to go forward, but there is a tactical battle going on when either side are in possession.
19 minThis has quickly developed into a fairly open game. Hasenhuttl suggested that his team would push forward and that is exactly what they are doing.
17 minThat said, Southampton are leaving more space at the back due to the greater ambition that they are showing. Chelsea just broke rapidly down the left but a cross towards Morata and Willian was over-hit.
SHOT!
15 minSouthampton have started to make an impact in this match. A cross from the left finds Ings, but the forward sends a header over the crossbar from around 12 yards out.
SHOT!
13 minBack come Chelsea and a floated pass over the top of the Southampton defence finds Morata, but the Spaniard's first-time header from the edge of the box is tame and goes straight at Gunn.
11 minSouthampton finally have some possession and a diagonal ball almost leads to a chance. However, Arrizabalaga is out quickly to head the ball away.
9 minThe home side win a free kick on the edge of the area, but Alonso's effort is deflected off target. Nothing comes from the resulting corner.
7 minChelsea are playing some attractive stuff - probably in an attempt to draw Southampton out - but so far, Southampton are prepared to sit deep and let their hosts have the ball.
5 minMore of the same from the home side but still no opportunities. Hazard almost picked out the run of Willian in the final third, but the pass was marginally over-hit.
3 minIt has been all Chelsea during the opening stages. Southampton have barely had a touch of the ball. However, for all of their possession, the Blues have not come close to creating a chance.
KICKOFF:
1 minChelsea get us underway at Stamford Bridge.
7.43pmA reminder of the two starting lineups...
CHELSEA XI: Arrizabalaga; Azpilicueta, Rudiger, Luiz, Alonso; Kante, Jorginho, Barkley; Willian, Morata, Hazard
SOUTHAMPTON XI: Gunn; Yoshida, Vestergaard, Bednarek; Soares, Romeu, Ward-Prowse, Valery; Armstrong, Redmond, Ings
7.41pmIt's time for the two teams to start making their way out in West London. It's a chilly evening in the capital, and both sets of supporters will want their attendance rewarding with a strong showing from their respective sides.
7.39pmThere are five other fixtures taking place this evening, and you are able to follow the contest between Newcastle United and Manchester United by clicking here.
7.37pmThe Saints went through a period between 2013 and 2015 where they only suffered three defeats in eight outings against the West Londoners, but that has changed in recent years. Chelsea have prevailed in each of the last seven matches in all competitions with 17 goals being scored during those fixtures.
7.35pmHEAD TO HEAD! Tonight's meeting will represent the 104th competitive encounter between the two clubs, with Chelsea winning 45 times in comparison to 30 victories for Southampton.
7.33pmPREDICTION! Chelsea have failed to score more than two goals in a Premier League match for two months, and that may continue on Wednesday evening due to their mounting injury list. However, the Blues have also won a number of tight contests and we are backing Sarri's men to do the same in this game.
7.31pmSounds like we can expect a bold performance from the visitors this evening...
7.29pmA number of the club's youngsters have been blooded since the start of the season and it has led to as many as 25 players being used in the Premier League this season. All but one of those - Tyreke Johnson - has started a match. That will increase to 26 with the inclusion of Angus Gunn, and a debut for Slattery will take the total to 27...
7.27pmHowever, that may be easier said than done. Southampton have not kept a clean sheet in their last 10 league matches!
7.25pmHasenhuttl will also be keen to improved his side's defensive record on the road. As many as 21 goals have been conceded in away fixtures this season, which is the second-worst total in the division.
7.23pmLet's turn our attention to Southampton now who are looking to avoid a third successive defeats. Hasenhuttl has watched his players lose out to West Ham United and Manchester City over the Christmas period.
7.21pmMorata is back in the team tonight, but it has been almost two months since the Spaniard scored in the Premier League. A double was netted against Crystal Palace at the beginning of November.
7.19pmHazard loves playing against the Saints. Not only did he play a starring role in the reverse fixture earlier this season, he has contributed four goals and three assists in his last six outings.
7.17pmThis is the first time that Chelsea have began a calendar year at Stamford Bridge for six years! On that occasion, they lost to Queens Park Rangers.
7.15pmThe Blues are also looking to achieve back-to-back clean sheets in the league for the first time this season. Surely they have to record two shutouts in a row at some stage?
7.13pmChelsea suffered defeat to Leicester City in their last home outing, and a further setback here would represent the first time that they have lost back-to-back games in the top flight since the closing months of 2011.
7.11pmThis man has contributed 10 goals and nine assists in the Premier League this season. Southampton have been warned...
7.09pmFourth-placed Chelsea head into this contest with the opportunity to move to within one point of Manchester City, who play host to Liverpool on Thursday night.
Southampton only remain out of the relegation zone on goal difference, but victory at Stamford Bridge could take the Saints as high as 15th position.
7.07pmMohamed Elyounoussi, Shane Long and Charlie Austin are all attacking options on the bench. There is also a place in the squad for Callum Slattery, who has come through the academy system, while Kayne Ramsey is back on the bench after being handed a start against Manchester City at the weekend.
7.05pmPierre-Emile Hojbjerg is suspended so Oriol Romeu and James Ward-Prowse will feature in the centre of the park. Stuart Armstrong, Nathan Redmond and Danny Ings have also been restored to make up the front three.
7.03pmHasenhuttl has made wholesale changes and it also includes a change in formation. The Saints look like they are going with three at the back tonight, and it means a return for Maya Yoshida. Cedric Soares also comes back into the fold at right wing-back with Yan Valery being deployed on the opposite flank.
7.01pmAs for Southampton, Ralph Hasenhuttl has opted to give a first Premier League start of the season to Angus Gunn, who has taken the place of Alex McCarthy between the sticks. The former Manchester City man has previously impressed in the EFL Cup.
6.59pmAs you can see from the bench, Chelsea are really struggling for options in the final third. Loftus-Cheek features among the replacements after a back problem, but it is unclear whether he is 100%. The same can be said of Cesc Fabregas. Pedro and Callum Hudson-Odoi remain sidelined with hamstring injuries.
6.57pmThe backline has remained the same, with Sarri avoiding the temptation to rest a couple of his defenders. Those alterations may come against Nottingham Forest in the FA Cup at the weekend.
6.55pmMateo Kovacic had been expected to come back into the team as a replacement for Ross Barkley, but the Englishman remains in the team with Kovacic missing out on a place in the squad. The Croatian is presumably carrying a knock.
6.53pmLet's start with Chelsea and as expected, there is no Olivier Giroud who sustained an ankle injury during the game against Crystal Palace at the weekend. It means that Alvaro Morata starts for the Blues for the first time since their final group-stage fixture in the Europa League on December 13.
6.51pmSOUTHAMPTON XI: Gunn; Yoshida, Vestergaard, Bednarek; Soares, Romeu, Ward-Prowse, Valery; Armstrong, Redmond, Ings
SOUTHAMPTON SUBSTITUTES: McCarthy, Stephens, Ramsey, Slattery, Elyounoussi, Long, Austin
6.49pmCHELSEA XI: Arrizabalaga; Azpilicueta, Rudiger, Luiz, Alonso; Kante, Jorginho, Barkley; Willian, Morata, Hazard
CHELSEA SUBSTITUTES: Caballero, Zappacosta, Christensen, Emerson, Ampadu, Fabregas, Loftus-Cheek
6.47pmWithout further ado, let's see who features in each starting lineup, beginning with the home side...
6.45pmHello and welcome to Sports Mole's live coverage of the match in the Premier League between Chelsea and Southampton. Both teams are in need of improvement at opposite ends of the table, and the pressure is on to achieve a result at Stamford Bridge.