Just to rub it in...published at 20:39 British Summer Time 20 September 2016
Everton 0-1 Norwich
Chelsea come from 2-0 down to beat 10-man Foxes
Preston beat Bournemouth after extra time - Makienok hat-trick
Perez scores twice as Arsenal thrash Forest
Liverpool ease through at Derby
Naismith scores as Norwich beat Everton 2-0
Tom Rostance
Everton 0-1 Norwich
on 81111
Just like on Donnie Brasco, 'if it had to be anyone, I'm glad it was Naismith.'
Baz
Half-time whistles are being blown around the grounds. We've had a goal in every game apart from Leeds 0-0 Blackburn...
Leicester 2-1 Chelsea
Gerry Taggart
Former Northern Ireland on BBC Radio 5 live sports extra
Chelsea second best all evening, Leicester cruising really but conceding in the last minute has let Chelsea back in the game.
Gary Cahill (45 mins)
Chelsea are right back in the tie as Cesc Fabregas' corner is headed back across goal by Gary Cahill, and it is just over the line before Danny Drinkwater clears it into David Luiz ans in.
The Brazilian looked keen to claim that but the goal-line camera confirms it's Cahill's.
Everton 0-1 Norwich
Shades of Ronaldinho at the Bernabeu as Steven Naismith's goal was applauded all around Goodison Park. He remains a popular player at Everton.
Brighton 0-1 Reading
Reading may be ahead at the Amex, but they're now down to 10 men as defender Tyler Blackett is sent off for a late challenge on Sebastien Pocognoli by referee Lee Probert.
The former Manchester United player becomes the second Reading player in as many games to be sent for an early bath after Garath McCleary saw red against Barnsley on Saturday.
Steven Naismith (41 mins)
The curse of the ex-player is alive and well! Steven Naismith has scored at the Gwladys End and he looks sheepish - because it's a total fluke.
He is played through, on his left foot, and slips as he pulls the trigger, inadvertently producing a deft lob over the keeper and in..
Nottingham Forest 0-1 Arsenal
Behind, against the run of play, to that stunner from Granit Xhaka but Forest are not put off their stride, and they go close when Nicolao Dumitru shoots wide when well placed.
Derby 0-1 Liverpool
Utter control for Liverpool against this Derby side who have forgotten how to score. They have spent an awful lot of money too in the last 24 months or so.
Leicester 2-0 Chelsea
Gerry Taggart
Former Northern Ireland on BBC Radio 5 live sports extra
Andy King did brilliantly there. He chested the ball down, volleyed it over the defender's head. Begovic sort of came out but then stood still before going to ground too early when Okazaki shot.
Good positive forward play from Leicester, poor defending from Chelsea.
Shinji Okazaki (34 mins)
Another goal for Leicester, another mess at the back for Chelsea. Shinji Okazaki has his second of the night and it's another mishit, hitting a shot into the turf and over Asmir Begovic, who hasn't covered himself in glory with either goal.
Leicester 1-0 Chelsea
Still fairly end-to-end at Leicester as Chelsea remain a threat going forward. But they are yet to really test Ron-Robert Zieler.
Stephen Quinn (32 mins)
Reading take the lead against their Championship opponents as Republic of Ireland international Stephen Quinn arrives at the back post to fire in a corner.
Brighton failed to clear and committed the defensive sin of letting the ball bounce in their own six-yard box before Quinn volleyed in left-footed.
Yoan Gouffran (13 mins)
Pick that one out! Rafa's Newcastle are on form and Yoan Gouffran, who barely resembled a footballer at times in the Premier League, has his second stunner in a matter of weeks, meeting a cross from the right with a stinging volley into the roof of the net.
Matt Ritchie (29 mins)
Lovely goal, very nicely done indeed by Matt Ritchie as he plays a one-two to break into the area and slide a left-footed finish across goal and into the corner.
Leicester 1-0 Chelsea
Chelsea have a great chance to level as Michy Batshuayi is left free at the far post but he can only head down and into the side-netting.
Granit Xhaka (23 mins)
Playing a £35m signing in the League Cup feels like basically cheating, and Granit Xhaka makes a difference with a rasping long-ranger. He whacked one in from range against Hull and he's at it again, via a big touch from Forest keeper Vladimir Stojković.
Ragnar Klavan
A first Liverpool goal for Estonian centre-back Ragnar Klavan, who capitalises on Derby's inability to clear a Philippe Coutinho corner to guide the ball into the bottom corner.
Leicester 1-0 Chelsea