Keogh picks up a late yellow as frustration sets in for Derby.
90' +2
The intensity has dropped off a bit as Chelsea pass it around looking to see this out without any more late scares. Derby are struggling to win the ball back here. Nugent's effort might have been their last chance.
90'
There will be a minimum of three minutes added on at the end of this match.
88'
Time running out for Derby, who really are unlucky not to be on level terms. Caballero is forced into another save, this one more straightforward on the end of Marriott's strike from 12 yards. The visitors have hardly given up their pursuit, making for some nervy moments at Stamford Bridge.
84'
Emerson gets yellow.
Emerson catches Bogle with a bit of a wild challenge right near the byline. That's a yellow card for the left-back, but more importantly here Derby will have a free-kick in a very threatening area.
82'
C. Forsyth enters the game and replaces S. Malone.
D. Nugent enters the game and replaces H. Wilson.
Forsyth comes on to replace Malone for the final 10 minutes, as part of a double switch here from Lampard.
Nugent is also on to provide an extra body in attack, with Wilson the one to give way.
80'
Into the final 10 minutes, meaning the time has come for Derby to throw caution to the wind in their pursuit of an equaliser. Lampard is preparing another change, maybe two, as they get set for a final push. They have to leave everything out on the pitch.
78'
César Azpilicueta enters the game and replaces D. Zappacosta.
Azpilicueta, another one of Lampard's former team-mates, is introduced with Chelsea's final change, as he takes the place of Zappacosta.
77'
Chelsea have weathered that strong Derby spell, as they're back in possession now, passing it around near the halfway line as they look to again suck the life out of this match. The hosts are showing no desire to get the ball forward into attack.
75'
Momentum has completely flipped over the last 10 minutes, with the pitch now tilted in Derby's favour. The visitors are getting bodies forward and keeping possession, applying decent pressure on the Chelsea goal. The final ball has been lacking, but they only need one chance.
Minute
Description
71'
Narrowly wide! Mount would love himself a goal against his parent club, and he nearly gets it with 20 minutes remaining as he sees an effort deflected inches wide of the near post from 25 yards!
69'
Pedro enters the game and replaces R. Loftus-Cheek.
A second switch for the Blues sees Loftus-Cheek give way for Pedro.
66'
David Luiz enters the game and replaces A. Christensen.
Chelsea's first change sees Sarri introduce Luiz, a former team-mate of Lampard, at the expense of Christensen.
62'
M. Bennett enters the game and replaces M. Waghorn.
Lampard goes to his bench for the first time tonight as Bennett comes on in the hopes of providing some much-needed energy in attack, with Waghorn giving way.
58'
Derby's intensity has dropped off in a big way since the break. The high press that was working so well for them in the first half is not being utilised in the second, and that's allowed Chelsea to sit comfortably on the ball.
56'
The tempo has really suffered as a result of Chelsea's dominance here. The hosts are in no rush to push the pace and the match is enduring some very slow periods as a result, with Chelsea walking through midfield.
54'
Possession has been dominated by Chelsea since the restart, as they search for a fourth goal that would likely put this match to bed. The Blues have already allowed Derby back into this match twice, and seem to have corrected their issues as they aim to prevent it from happening again.
50'
More inventiveness from Loftus-Cheek, who is having an easy go getting to the byline and sending balls into the box. His latest delivery takes a deflection, calling Carson into action at the near post, where an unconvincing bit of goalkeeping isn't punished by Morata, who simply cannot take advantage.
48'
Chelsea open up the second half on the front foot, with Loftus-Cheek putting the Derby defence under pressure with an enterprising bit of play. The final ball is again lacking, however, as the visitors clear their lines.
46'
Back underway at Stamford Bridge!
45' +2
HALF-TIME: CHELSEA 3-2 DERBY COUNTY.
45'
There will be a minimum of two minutes added on at the end of this first half.
41'
Cesc Fàbregas has scored a goal for Chelsea! Assist by D. Zappacosta.
Zappacosta got on the end of Loftus-Cheek's cross initially, before helping to lay it off for Fabregas as he's credited with the assist. It was Zappacosta who provided the crosses which led to the two Derby own goals, as well.
CHELSEA BACK IN FRONT YET AGAIN! Fabregas makes it 3-2! A Loftus-Cheek cross eventually falls kindly for Fabregas, who sees his first-time effort take a slight deflection off the chest of Tomori, and it's enough to see it beyond Carson! This one isn't an own goal, but Derby can't catch a break in defence!
39'
This sort of intensity will be difficult for Derby to keep up through 90 minutes, which Lampard surely has to be aware of. This especially holds true given the fact that these same 11 players all started on Saturday, as well.
37'
Derby's high press has really helped to slow Chelsea in transition. Their intensity off the ball has prevented the Blues from completing those quick passes to help them progress through midfield, which has really helped make life easier on the back four.
35'
The hosts are back in the ascendancy as they enjoy a prominent spell in possession, but there's been little service for Morata to feed upon. Tomori and Keogh have responded excellently to their own goals, putting them out of sight and out of mind.
33'
Chelsea have really struggled to find consistency in their approach in this first half, with Derby doing an excellent job to combat them, especially in the centre of the pitch. The only real joy the Blues have had has come out wide, and they've been forced to go to the flanks with Derby closing their gaps excellently through the middle.
29'
No shortage of entertainment through 30 minutes at Stamford Bridge! Four goals evenly split, but it's Derby who have been the better and sharper of the two sides, as they are unlucky not to be leading. Still plenty of time left in this one, but Sarri can't be happy with how his Chelsea side have performed thus far.
27'
M. Waghorn has scored a goal for Derby County! Assist by M. Mount.
Chelsea loanee Mount served that up on a platter for Waghorn, as he picks out a fantastic assist to pull his current side level against his former club.
PARITY RESTORED YET AGAIN! 2-2! Rinse, repeat! That's been the story of this first half at Stamford bridge! Derby concede an own goal and then minutes later they pull themselves back in it - this time Waghorn simply couldn't miss from five yards on the end of Mount's delicious delivery from the left, following a terrific team move down the flank.
25'
This has been quite the shocking start at Stamford Bridge. Derby could be up 2-0 given the quality of their chances, but it's Chelsea who lead 2-1 despite having yet to register a shot on target! Can Lampard's side recover again? They're certainly not making it easy on themselves.
21'
R. Keogh is unfortunate, scores an own goal!
ANOTHER OWN GOAL! CHELSEA LEAD 2-1! This is absolutely stunning! Derby are the architects of their own downfall yet again! It's a near replica of the opener, instead this time it's Keogh who scuffs a clearance on the end of Zappacosta's cross, leaving Carson wrong-footed as Chelsea are gifted yet another lead!
19'
Derby continue to grow into this match. They remain in the ascendancy, and have since falling behind. They're spending more time on the ball, admirably sticking to their usual approach of playing on the ball despite the stature of tonight's opponents.
15'
Chelsea are finding plenty of space on the flanks, but their final ball has left plenty to be desired. They've sent a number of crosses in thus far, but there's been no one on the end of them.
13'
So a pair of defensive errors have this match even at ones, leaving it brilliantly poised. The resiliency of Lampard's side cannot be overlooked - they trailed 1-0 early on at Old Trafford inn the previous round as well before battling back to earn a 2-2 draw and eliminating Manchester United on penalties.
9'
J. Marriott has scored a goal for Derby County! Assist by T. Huddlestone.
Huddlestone's throughball was perfectly weighted for Marriott, as he provides the assist.
DERBY ARE RIGHT BACK IN IT! 1-1! What a response from the visitors! It's something of a gift as Cahill, a former team-mate of Lampard, gives the ball away with a dreadful pass, before then slipping to allow Huddlestone to play Marriott through on goal, and the striker makes no mistake finishing coolly into the bottom corner! Parity restored!
7'
This is exactly the type of start Derby will have wanted to avoid, as Chelsea can now settle things down and play on the ball. All the responsibility will be placed on Derby, who continue to come under pressure here as they're struggling to pick themselves up following that nightmarish start.
5'
F. Tomori is unfortunate, scores an own goal!
A DISASTROUS START FOR DERBY! 1-0 CHELSEA! It's a head in hands moment for the Chelsea loanee Tomori, as a horrible miskick sees him turn Zappacosta's cross into his own net! A horendous moment for the 20-year-old to gift his parent club the lead!
3'
Chelsea have dominated possession in the opening minutes, which is to be expected tonight. The Blues usually keep around 70 per cent possession in their matches under Sarri, and will expect more of the same. Derby are used to dominating possession themselves in the Championship, however, so this will be an adjustment for them.
1'
AND THEY'RE OFF! Chelsea in their traditional blue home strip as they get the match underway, with Derby in their classic white tops and black shorts.
Both sides came out on the winning end of thrilling third-round ties – Chelsea scoring twice late to come from behind and beat Liverpool at Anfield, while Derby County shocked Manchester United on penalties at Old Trafford.
Hello and welcome to live coverage of the EFL Cup as Chelsea welcome Derby County to Stamford Bridge for their fourth-round clash!
Some of Lampard’s former team-mates will be hoping to spoil his managerial return, while preserving Chelsea’s 14-match unbeaten run across all competitions, with the Blues yet to lose at Stamford Bridge under Maurizio Sarri.
Those results have set up this tantilising fourth-round clash which may just be the pick of the lot as long time Chelsea legend Frank Lampard makes his first managerial visit to Stamford Bridge, a ground where he made his name in the world of football.
CONFIRMED TEAM NEWS:
Derby have lost just twice in their last 14 matches, and they have been in impressive form away from home in the last five weeks, winning at Old Trafford and the Hawthorns, while holding Championship title hopefuls Middlesbrough to a 1-1 draw at the Riverside Stadium on Saturday.
CHELSEA (4-3-3): Willy Caballero; Davide Zappacosta, Gary Cahill, Andreas Christensen, Emerson; N'Golo Kante, Cesc Fabregas, Mateo Kovacic; Willian, Ruben Loftus-Cheek, Alvaro Morata.
SUBS: Danny Drinkwater, Pedro, Cesar Azpilicueta, Callum Hudson-Odoi, David Luiz, Marcin Bulka, Ross Barkley.
DERBY COUNTY (4-3-3): Scott Carson; Jayden Bogle, Richard Keogh, Fikayo Tomori, Scott Malone; Mason Mount, Tom Huddlestone, Harry Wilson; Martyn Waghorn, Tom Lawrence, Jack Marriott.
SUBS: Duane Holmes, David Nugent, Kelle Roos, Bradley Johnson, Craig Forsyth, Mason Bennett, Curtis Davies.
Before kick-off there will be a moment of silence observed to honour the five victims of Saturday's tragic accident at the King Power Stadium, including Leicester City owner Vichai Srivaddhanaprabha.
Derby have enjoyed the better of the chances in the first half despite their limited possession, yet find themselves with it all to do in the second half. Frank Lampard will have to love how his resilient side have battled in this first half, but will hardly be enamoured by the fact that Chelsea have three goals despite managing just two attempts on goal.
A wildly entertaining first half at Stamford Bridge ends with lucky Chelsea narrowly edging a five-goal thriller, thanks to a pair of own goals. Jack Marriott and Martyn Waghorn quickly restored party for Derby County following Fikayo Tomori and Richard Keogh own goals, before Cesc Fabregas put Chelsea ahead for a third time late on.
That's all for our live coverage, thanks for following along. Goodbye!
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