Full-time: Chelsea 0-0 Arsenal
- Carabao Cup semi-final remains finely poised after a goalless first-leg draw at Stamford Bridge that lacked any of the excitement of last week's pulsating Premier League encounter between these two London rivals
- Stand-in Arsenal captain Jack Wilshere limps off with an ankle injury shortly before the hour mark
- No VAR reviews are initiated as the technology makes its second appearance in competitive English football, but referee Martin Atkinson receives advice on penalty appeals in each half involving Ainsley Maitland-Niles and Cesc Fabregas
- Arsene Wenger watches the match from the press box as he continues to serve an FA touchline ban
- Alexis Sanchez appears as a substitute amid latest Manchester City transfer rumours after initially being expected to start the game
- Wenger: "You cannot explain every single decision, that is the decision of today"
- Recap: Manchester City 2-1 Bristol City
Nothing to separate these two rivals in a disappointing game that was a pale imitation of last week's captivating league contest at the Emirates.
The decisive second leg takes place in a fortnight. Arsenal face Bournemouth and Crystal Palace before then, while Chelsea take on Leicester and Brighton either side of their FA Cup third-round replay against Norwich.
Chelsea 0-0 Arsenal
Alonso struggles to get the better of Bellerin and Chambers clears the ball into touch.
Chelsea work it right and Fabregas' return pass for Moses goes behind for a goal kick.
Five minutes of added time signalled by the fourth official. Can either of these London rivals strike a late first-leg blow?
One angle shows Welbeck getting the ball and, after a brief delay, play restarts with a corner that is headed over by Batshuayi.
Willian releases Fabregas down the right channel and his cross deflects off Xhaka and onto the post.
Atkinson is now receiving word from the VAR after Welbeck's earlier challenge on Fabregas. Conte was adamant that it should be looked at.
Arsenal applying a bit of pressure here as we enter the closing stages. Xhaka's hopeful shot skips up off the turf before being gathered by Courtois.
Elneny is booked for a trip on Morata, who makes way for Michy Batshuayi.
Elneny's effort is charged down by Moses. Five minutes plus stoppage time remaining.
Willian tries to outmuscle Sanchez and gives away a free-kick. Bakayoko for Hazard is Conte's second change of the evening.
Are Chelsea content with a goalless draw?
Kante slides in late on Welbeck and joins Xhaka in the book.
Sanchez's free-kick towards Mustafi at the back post bounces wide.
Welbeck's shot from just inside the Chelsea box is blocked. Xhaka, already on a yellow card, is now walking a tightrope after a couple of cheap fouls in quick succession.
Hazard strides down the Chelsea left and shapes to cross, but cannot find a way past Holding.
Kante puts the brakes on an Arsenal counter involving Sanchez and Iwobi and Alonso tries his luck with a tame shot that is easily held by Ospina.
Mustafi gets his head to another Chelsea cross and Ospina has no issue in holding a deflected long-range strike from Willian.
15 minutes to go at the Bridge.
A clever cross from Moses is cleared.
Iwobi carries the ball forward with purpose for Arsenal before rolling a sort of laughable toe poke into the path of Courtois with Sanchez and Welbeck both in support.
More injury concern for Arsenal as Chambers stays down for treatment after being deceived by that piece of skill from Hazard.
Chelsea's first change of the evening sees Willian replace Drinkwater.
Hazard neglects to shoot after fooling Chambers and Holding, instead trying a pass to his right. Maitland-Niles clears.
Alonso's looping cross from the left is flicked on by Maitland-Niles before a low drive from Moses is deflected over by Mustafi.
Ospina is caught in no man's land from the subsequent corner and Christensen heads a good chance wide of the back post.
Mustafi clears another cross before Sanchez jogs on in place of the underwhelming Lacazette.
Chambers remains vigilant to clear away an Azpilicueta cross intended for Hazard.
It looks like Sanchez is preparing to enter the fray for Arsenal.
Arsenal had really been struggling to escape their own half before Maitland-Niles' dangerous lofted ball towards Welbeck is claimed by Courtois.
Chelsea break but it's another disappointing passage of play from Morata.
Some gung-ho defending from Mustafi almost opens the door for Morata, who ends up playing the ball into the side netting as Ospina comes out to close the angle.
Wilshere looks dejected as he tosses the captain's armband to Mustafi and hobbles off to be replaced by Elneny.
Wilshere limps back on but surely won't be able to continue.
Morata finds himself in a lot of space in a central position and his well-struck shot is parried by Ospina.
Arsenal have been put under a lot of pressure in the early stages of this second period.