Kai Havertz scored a hat-trick as Chelsea romped to a 6-0 victory against Barnsley and into the fourth round of the Carabao Cup.

Tammy Abraham opened the scoring for a much-changed Chelsea side, and Havertz doubled their lead before the break. Ross Barkley then notched a third early in the second half at Stamford Bridge on Wednesday night, before Havertz added two more.

It was a night of good news for Chelsea's new signings and Frank Lampard as Thiago Silva made his debut for the club, and Ben Chilwell also enjoyed a first appearance for the club off the bench - assisting a late sixth for fellow substitute Olivier Giroud.

Player ratings

Chelsea: Caballero (7), Azpilicueta (6), Tomori (7), Silva (6), Emerson (6), Barkley (7), Kovacic (7), Mount (7), Havertz (8), Abraham (8), Hudson-Odoi (7)

Subs: Zouma (6), Chilwell (7), Giroud (7)

Barnsley: Collins (4), Ludewig (4), Sollbauer (4), Halme (4), J Williams (4), Styles (6), Ritzmaier (5), Mowatt (4), Woodrow (5), Frieser (5), Schmidt (5)

Subs: Oduor (5), Chaplin (5), Thomas (5)

Man of the match: Kai Havertz

Havertz stars as Chelsea thrash Barnsley

Barnsley had a somewhat shaky start but grew in confidence and really took the game to Chelsea, testing their defence once or twice and forcing Silva and Fikayo Tomori into some errors early on.

But a mistake at the back cost them the opener on 19 minutes as a loose pass while trying to play out handed the ball to Abraham, and he took a touch before firing past Brad Collins.

Team news

Frank Lampard made eight Chelsea changes as Thiago Silva made his debut. Kai Havertz also started, while Ben Chilwell was on the bench. Willy Caballero began in goal with Kepa Arrizabalaga left out of the squad.

Barnsley boss Gerhard Struber made five changes from the side that lost to Reading at the weekend, with Callum Styles, Aapo Halme and Patrick Schmidt among those coming in.

Any hopes of a Barnsley comeback were soon quelled in the second half. After 49 minutes they were responsible for their own downfall again as Alex Mowatt made it too easy for Havertz to nick it off his toe and find Barkley, who charged into the box and fired home.

Six minutes later it was four as Chelsea won the ball high up again and Mateo Kovacic played in Abraham, who found Havertz in the middle to slot in. And after 65 minutes it was hat-trick completed as Havertz linked up with Abraham again, latching onto his ball in behind before beating the goalkeeper and sliding the ball into an empty net.

A fine night for Chelsea was then capped off on 83 minutes as Chilwell crossed for Giroud to nod home a sixth from close range.

Analysis: How did Thiago Silva perform on his debut?

It was mostly a calm start to life in England for Thiago Silva. The first few minutes of his debut saw plenty of good touches and silky passes out of defence, but he may have got a little too relaxed on 14 minutes as a sloppy moment saw him give the ball away and allow Barnsley a chance to score.

Despite just turning 36 this week he also proved he's no slouch as he raced out of position on more than one occasion to make some key interventions and sliding challenges, too.

There will be bigger challenges to come but overall it was a very useful hour workout for the former Paris Saint-Germain star. It remains to be seen, however, if Lampard will thrust him straight into his Premier League side now on Saturday.

Man of the Match - Kai Havertz

Kai Havertz scored his first goal for Chelsea against Barnsley in the Carabao Cup

It seems mad that a 21-year-old with just two Premier League appearances under his belt could be under any kind of immediate and significant pressure to perform, but the price tag and the nature of the modern game meant this was a huge night for Havertz.

He looked far more comfortable in a more central role, took his goals well and linked up brilliantly with Abraham, who deserves an honourable mention for his performance, too. You would expect Lampard to keep him at No 10 now going forward if he wants to get the best out of him.

What's next?

Chelsea head to West Brom in the Premier League on Saturday, live on Sky Sports Premier League from 5pm, with kick-off at 5.30pm. Barnsley are back in Championship action at home to Coventry at 3pm on Saturday.

Click Here For Official Team Sheet

Teams

Chelsea Caballero, Azpilicueta (c), Tomori, Silva (Zouma 61), Emerson, Barkley, Kovacic, Mount, Havertz (Chilwell 66), Abraham (Giroud 72), Hudson-Odoi
Subs Not Used Baxter, James, Jorginho, Werner
Booked
Goals Abraham 19, Havertz 28, 55, 65, Barkley 49, Giroud 83

Barnsley Collins, Ludewig, Sollbauer, Halme, J. Williams, Styles, RitzMaier (Odur 57), Mowatt, Woodrow (Thomas 45), Frieser, (Chaplin 57) Schmidt
Subs Not Used Walton, Moon, Simoes, Abeboyejo
Booked Collins
Goals

Attendance 0

Referee Darren Bond

VAR None