Abraham goes down as Chelsea defend a cross into the box. It looks like he's hurt his left shoulder but he refuses treatment to stay on and help defend the subsequent corner, which Chelsea do get away.
88'
Barnsley are stepping the tempo up now. Dike and Woodrow have seen shots blocked as the hosts push forward in search of an equaliser.
86'
Woodrow gets his head to a free-kick delivery, but it's only just inside the box and he can't get any power on the effort, meaning it loops harmlessly into Kepa's grasp.
82'
The rhythm of the game is starting to get disrupted, with neither side able to keep the ball for long spells. Barnsley's best route to goal now appears to be via a set-piece.
80'
M. Kovačić enters the game and replaces C. Pulišić.
Pulisic, who has had a quiet evening, is replaced by Kovacic now as Tuchel looks to control the game more in the closing stages.
76'
M. Sollbauer enters the game and replaces T. Sibbick.
Ismael makes a change at the back now, bringing off Sibbick for the experienced Sollbauer.
73'
J. Williams enters the game and replaces C. Brittain.
R. Palmer enters the game and replaces H. Kane.
Ismael makes another double change now as he tries to get his side back on level terms. Brittain is off for Williams in the first alteration.
Meanwhile, Kane is also replaced by Palmer in midfield as Ismael looks to inject fresh legs for the remainder of the game.
71'
That goal seems to have given Chelsea's confidence a real boost and they're knocking it about with a little more swagger now.
69'
T. Anjorin enters the game and replaces H. Ziyech.
Tuchel makes his third change of the night, bringing the quiet Ziyech off for academy product Anjorin.
Minute
Description
66'
Barnsley look to hit back immediately as they try to make the most of a set-piece, but it culminates in Andersen blasting high over the bar from inside the box.
64'
T. Abraham has scored a goal for Chelsea! Assist by R. James.
Substitute James stretched the Barnsley defence well and had the pace to get beyond his marker before finding Abraham to his left with the goal at his mercy.
GOAL!! CHELSEA TAKE THE LEAD!! James bursts into space down the right and charges into space, drawing Collins off his line before fizzing a low ball across goal for Abraham to tap into an empty net! It's 1-0 to Chelsea!
63'
The game is starting to open up now, with gaps appearing at both ends. It feels like a potentially decisive goal is coming.
59'
D. Frieser enters the game and replaces C. Chaplin.
D. Dike enters the game and replaces V. Adeboyejo.
Barnsley boss Ismael makes a double-change of his own now as he searches for what could be a decisive goal. Adeboyejo is the first man to depart, with Dike replacing him.
Chaplin also makes way for Frieser as Ismael brings on a second pair of fresh legs in the front three.
57'
Woodrow is played into the Chelsea box down the left, but Rudiger matches him and blocks the shot from a tight angle, preventing the corner and clearing.
55'
Barnsley have Chelsea under pressure at the moment and pepper the box with crosses that are cleared, but only as far as a Barnsley shirt. The Blues can't get out at the moment.
53'
Hudson-Odoi concedes a free-kick in the Barnsley half after a loose touch and goalkeeper Collins comes out to take it, with the hosts pushing everyone forward. They're prepared to take risks in search of a goal.
51'
Chelsea win a corner, which Ziyech takes from the left, but it's a very underwhelming delivery that hits the first man and is cleared.
49'
Tuchel is furious on the sidelines as Chelsea continue to give possession away cheaply. He's not at all happy with what he's seeing from his players.
47'
Barnsley start the second half with the same intent that they ended the first as Chaplin bursts forward and takes on a shot from outside the box, but he drags it wide of the far post.
46'
A. Rüdiger enters the game and replaces A. Christensen.
R. James enters the game and replaces Marcos Alonso.
Tuchel makes a double-change at the break as he looks for an improved second-half performance from his side. Christensen comes off for Rudiger at centre-half in the first alteration.
We're back underway for the second half!
Meanwhile, Alonso goes off for a natural right-back in James, meaning a shift to a 4-2-3-1 as Emerson moves out as a traditional left-back and Hudson-Odoi pushes forward onto the wing, with Ziyech slotting in behind Abraham.
45'
HALF-TIME: BARNSLEY 0-0 CHELSEA
42'
Chelsea aren't playing the ball out from the back with consistent quality and it's breaking down far too often. Barnsley's tactical approach has prevented the visitors from asserting themselves and Tuchel's side look a little flat.
40'
Hudson-Odoi is fed into plenty of space on the right by Pulisic and the Englishman whips a cross in to the back post where Pulisic races to meet it, but he loses his footing as he connects with the ball from a tight angle and can't steer it on target!
38'
Kante tries to up the tempo of Chelsea's passing with some quick, one-touch play, but a terrific tackle by Helik puts a stop to the danger and Barnsley clear.
36'
Brittain shows great determination and some neat touches to beat Alonso out wide and loft a cross in that Hudson-Odoi barely manages to hack away under pressure.
34'
Barnsley are managing to put Chelsea under a sustained spell of pressure now. They're bravely pushing men forward to spring an attack when they win the ball in advanced areas.
30'
Hudson-Odoi shifts sharply away from Mowatt as he skips down the right and Mowatt lunges in clumsily, conceding a free-kick. He's perhaps lucky to avoid a booking for that challenge.
28'
There's some concern for Christensen, who attempted to tackle Chaplin with his head after going to ground and ended up tacking a knock to the back of his skull, but the Chelsea defender is back on his feet now and appears to be able to continue.
25'
Hudson-Odoi surges into space down the right and fizzes in a superb low cross towards Abraham in the middle, but Helik slides in and cuts the ball out, sending it behind for a corner. Great interception.
21'
Chelsea are finally asserting their authority now as they grow into the game, showing a little more quality in possession than they were earlier in the half.
17'
Barnsley's game-plan unsettled Chelsea in the opening 15 minutes of the game, but the visitors are slowly starting to get more of a foothold in proceedings.
15'
Abraham tries to burst beyond the Barnsley defence, but Sibbick has the pace to match him and gets a touch on the ball. The defender inadvertently sends a looping ball back towards his goalkeeper, but Collins gathers calmly.
9'
Hudson-Odoi thinks he's away behind the Barnsley defence as Kante plays it through, but the flag goes up for offside and the hosts breathe a sigh of relief.
7'
Barnsley's high press pays dividends again and the ball is worked to Kane on the edge of the box, but the midfielder rushes his effort and ends up dragging the shot well wide of the target.
5'
Chelsea have persisted with the 3-4-3 shape they used in the last game, with left-back Emerson filling in on the left of the back three and Hudson-Odoi playing as a right wing-back.
3'
Barnsley press high and win the ball in an advanced area, but Woodrow snatches at his shot from the right side of the box and sends it high over the bar.
1'
We're under way at Oakwell!
Barnsley XI (3-4-3): Bradley Collins; Toby Sibbick, Michal Helik, Mads Andersen; Callum Brittain, Herbie Kane, Alex Mowatt, Callum Styles; Victor Adeboyejo, Cauley Woodrow, Conor Chaplin.
Barnsley substitutes: Michael Sollbauer, Daryl Dike, Romal Palmer, Dominik Frieser, Jasper Moon, Clarke Oduor, Jordan Williams, Cameron Thompson, Jack Walton.
Chelsea substitutes: Willy Caballero, Ben Chilwell, Antonio Rudiger, Lewis Bate, Olivier Giroud, Faustino Anjorin, Reece James, Cesar Azpilicueta, Mateo Kovacic.
Chelsea XI (3-4-3): Kepa Arrizabalaga; Andreas Christensen, Kurt Zouma, Emerson; Callum Hudson-Odoi, N'Golo Kante, Billy Gilmour, Marcos Alonso; Hakim Ziyech, Tammy Abraham, Christian Pulisic.
Hello and welcome to our LIVE coverage of the FA Cup fifth-round tie between Barnsley and Chelsea at Oakwell.
Barnsley play their third successive home tie in the FA Cup this season, having already beaten Tranmere Rovers and Norwich City. However, they host Premier League opponents in Chelsea this time, who overcame Morecambe and Luton Town to reach this stage.
Barnsley have been brave and well-organised, pressing high, disrupting Chelsea and looking to make the most of their high turnovers. Chelsea, meanwhile, have been disappointing, and Tuchel will demand better in the second half, particularly in the quality of his team's passing.
Barnsley travel to face Brentford next, while Chelsea host Newcastle United as both teams return to league action.
Thank you for joining our coverage, we hope you enjoyed the game. Until next time, goodbye!
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