Match ends, Chelsea 3, Luton Town 1.
A Tammy Abraham hat-trick earned Chelsea victory over Luton Town in the FA Cup fourth round to relieve some pressure on manager Frank Lampard.
Abraham slotted in from Timo Werner's cut-back before nodding in a second from Reece James' chip.
Jordan Clark scored for the visitors - after an error by keeper Kepa Arrizabalaga- on 30 minutes to keep them in the game.
But Abraham poked home to seal victory before Timo Werner missed a penalty.
Chelsea will face Championship side Barnsley in the fifth round.
- Chelsea v Luton as it happened, plus updates from the rest of Sunday's FA Cup fourth-round ties
- Watch all the goals from the FA Cup fourth round
Chelsea - who won the competition in 2018 and were beaten finalists last season - were in complete control at 2-0 and Christian Pulisic and Abraham both went close to increasing their lead.
But Luton, who edged past Reading in the last round, settled into the game after James Bree crossed in for Clark to squeeze his shot under Kepa, who should have done better.
The Blues were sloppy at times in the second half and Luton had chances, Kepa saving from Harry Cornick and Tom Lockyer to redeem himself after the earlier error.
Callum Hudson-Odoi replaced Pulisic on 70 minutes and made an immediate impact, having a shot blocked with with his first touch before setting up Abraham with a low cross for Chelsea's third goal.
Werner, who scored his first goal in 13 games against Morecambe in the third round, had the chance to make it 4-1 five minutes from time after being tripped in the box by Clark, but saw his spot-kick saved by Luton keeper Simon Sluga.
It was a welcome victory for Lampard, who has come in for criticism over Chelsea's Premier League position - they sit ninth in the table after five defeats in their past eight games.
'Hard to leave Gilmour out' - what they said
Chelsea boss Lampard: "Playing like he did today it will be very difficult to leave Billy Gilmour out because he was outstanding.
"His comfort on the ball, the way he moves it, his discipline, personality on the team. He was brilliant.
"In the short term, he won't be going on loan. Billy is a Chelsea player and his levels today showed that it's right he's a Chelsea player in the middle of the park."
Luton manager Nathan Jones: "It was a great test for us and I'm very proud of the game we gave Chelsea.
"We gave ourselves a mountain to climb in the first 20 minutes, but I will accept responsibility for that because I wanted us to be attacking in our shape and do more than just defend.
"Once we changed that shape I thought we were excellent."
Best of the stats
- Chelsea have reached the fifth round of the FA Cup in 21 of the past 23 seasons, only failing in 2010-11 and 2014-15.
- Luton have been knocked out in their past six domestic cup ties against Premier League opposition.
- Chelsea have won 18 of their past 21 FA Cup games at Stamford Bridge, including all four home matches in the competition since the start of last season.
- Abraham became the first Chelsea player to score an FA Cup hat-trick since Oscar against MK Dons in January 2016, and the Englishman to do so since Lampard got three goals against Macclesfield in January 2007.
Player of the match
AbrahamTammy Abraham
Chelsea
Avg
- Squad number9Player nameAbrahamAverage rating
7.80
- Squad number23Player nameGilmourAverage rating
6.84
- Squad number20Player nameHudson-OdoiAverage rating
6.69
- Squad number19Player nameMountAverage rating
6.58
- Squad number22Player nameZiyechAverage rating
6.21
- Squad number18Player nameGiroudAverage rating
5.83
- Squad number17Player nameKovacicAverage rating
5.80
- Squad number24Player nameJamesAverage rating
5.61
- Squad number29Player nameHavertzAverage rating
5.54
- Squad number15Player nameZoumaAverage rating
5.53
- Squad number10Player namePulisicAverage rating
5.47
- Squad number33Player nameEmersonAverage rating
5.29
- Squad number11Player nameWernerAverage rating
5.19
- Squad number4Player nameChristensenAverage rating
4.95
- Squad number1Player nameArrizabalagaAverage rating
3.82
Luton Town
Avg
- Squad number22Player nameDewsbury-HallAverage rating
7.58
- Squad number18Player nameClarkAverage rating
7.30
- Squad number7Player nameCornickAverage rating
7.22
- Squad number17Player nameMpanzuAverage rating
7.21
- Squad number5Player nameBradleyAverage rating
7.07
- Squad number26Player nameBreeAverage rating
7.02
- Squad number24Player nameNaismithAverage rating
7.01
- Squad number15Player nameLockyerAverage rating
6.99
- Squad number3Player nameDan PottsAverage rating
6.97
- Squad number12Player nameSlugaAverage rating
6.96
- Squad number8Player nameBerryAverage rating
6.90
- Squad number14Player nameMoncurAverage rating
6.87
- Squad number4Player nameTunnicliffeAverage rating
6.82
- Squad number25Player nameLuaLuaAverage rating
6.77
- Squad number19Player nameCollinsAverage rating
6.74
- Squad number16Player nameReaAverage rating
6.46
Line-ups
Chelsea
Formation 4-2-3-1
- 1Arrizabalaga
- 24James
- 4Christensen
- 15Zouma
- 33Emerson
- 19MountSubstituted forKovacicat 84'minutes
- 23Gilmour
- 22ZiyechSubstituted forHavertzat 77'minutes
- 11Werner
- 10PulisicSubstituted forHudson-Odoiat 70'minutes
- 9AbrahamSubstituted forGiroudat 77'minutes
Substitutes
- 2Rüdiger
- 5Jorginho
- 13Caballero
- 17Kovacic
- 18Giroud
- 20Hudson-Odoi
- 21Chilwell
- 28Azpilicueta
- 29Havertz
Luton
Formation 5-3-2
- 12Sluga
- 26BreeSubstituted forLuaLuaat 61'minutes
- 15Lockyer
- 16ReaSubstituted forPottsat 45'minutes
- 5Bradley
- 24NaismithSubstituted forMoncurat 75'minutes
- 4TunnicliffeSubstituted forBerryat 61'minutes
- 22Dewsbury-Hall
- 18ClarkBooked at 85mins
- 7CornickSubstituted forCollinsat 60'minutes
- 17Mpanzu
Substitutes
- 1Shea
- 3Potts
- 8Berry
- 9Hylton
- 10Lee
- 14Moncur
- 19Collins
- 25LuaLua
- 27Nombe
- Referee:
- David Coote
Match Stats
- Possession
- Home68%
- Away32%
- Shots
- Home21
- Away8
- Shots on Target
- Home7
- Away3
- Corners
- Home7
- Away3
- Fouls
- Home5
- Away9
Live Text
Post update
Full Time
Second Half ends, Chelsea 3, Luton Town 1.
Post update
Attempt saved. Olivier Giroud (Chelsea) right footed shot from the centre of the box is saved in the centre of the goal.
Post update
Attempt blocked. Olivier Giroud (Chelsea) left footed shot from outside the box is blocked.
Post update
Billy Gilmour (Chelsea) wins a free kick in the defensive half.
Post update
Foul by James Collins (Luton Town).
Post update
Kai Havertz (Chelsea) wins a free kick in the defensive half.
Post update
Foul by Sonny Bradley (Luton Town).
Post update
Attempt missed. Callum Hudson-Odoi (Chelsea) right footed shot from the left side of the box misses to the right. Assisted by Emerson.
Post update
Offside, Chelsea. Callum Hudson-Odoi tries a through ball, but Timo Werner is caught offside.
Post update
Penalty saved! Timo Werner (Chelsea) fails to capitalise on this great opportunity, right footed shot saved in the centre of the goal.
Booking
Jordan Clark (Luton Town) is shown the yellow card for a bad foul.
Post update
Penalty Chelsea. Timo Werner draws a foul in the penalty area.
Post update
Penalty conceded by Jordan Clark (Luton Town) after a foul in the penalty area.
Substitution
Substitution, Chelsea. Mateo Kovacic replaces Mason Mount.
Post update
Corner, Luton Town. Conceded by Emerson.
Post update
Emerson (Chelsea) wins a free kick in the defensive half.
Post update
Foul by Kazenga LuaLua (Luton Town).
Post update
Hand ball by Olivier Giroud (Chelsea).
Post update
Offside, Luton Town. Jordan Clark tries a through ball, but Luke Berry is caught offside.

- All the goals, highlights and drama from Saturday's fourth-round ties are streaming now on BBC iPlayer

Comments
Join the conversation
Jimmy Floyd Hasselbaink ex Chelsea and Karen Cairney ex Chelsea.,both chosen as pundits for the match.
Yet nobody invited on the show as a pundit on behalf of Luton Town.
We even had to endure listening to Hasselbaink talking about managing Burton Albion.
It might as well have been Chelsea TV it was so biased.
Abs disgraceful coverage yet again!
Her voice grates so much,awful commentary
Apart from the missed Pen , his overall game was far more encouraging
And the 3rd goal very well worked from Billy G and CHO
Sorry BBC but I had to mute the commentary as I found Karen Carney’s monotone voice and bland insight irritating!
1/.The commentary was the worst I have heard in decades and I actually switched off. Carney bleating on all the time, why use 3 words when I can get away with 20? Bring back John Motson!
2/.Poor reffing, two balls on the pitch not stopped by ref or VAR, breaking the rules!
3/.Kepa like Bambi in the headlights makes yet another mistake! It's Jan, time to sell!
Shame for Luton as they put in a good show.
Well done Chelsea. Abraham had his day and as BBC Carney would put it; He'll be happy with the 3 Points.
Frank will need to being starting him in the league if he wants to save his job
Chelsea had the higher quality and Gilmore was a bright spark in the team, however it feels this Chelsea team really has another level or two to find and the manager needs to start working on the attacking chemisty.
To think we pay these peoples wages as well.
Shocking coverage as per usual.
Not so much so for Chelsea supporters, this squad clearly has problems in defence and attack.
But frankly, even if BBC were to show more games, think less and less people will watch BBC because the PC and social engineering is getting more rarified and appealing to fewer and fewer.