Chelsea win another free-kick on the opposite side of the field, and Chilwell delivers into the box. It's headed away as far as James, who feigns shooting before teeing up Gallagher, and his back-post cross is also deflected clear before Chilwell lashes a half-volley miles over the bar!
90' +3
L. Digne gets yellow.
Digne slides in wildly on Madueke to catch the Chelsea substitute on the edge of the box, and the needless challenge from the Villa left-back rightfully warrants a yellow card.
90' +1
We're into five minutes of added time, and it's now or never for Chelsea to prevent being sent into the bottom half of the table by Villa!
89'
L. Digne enters the game and replaces Álex Moreno.
Another change is made late on by the visitors, and it's a like-for-like replacement at left-back as Lucas Digne comes on for Moreno.
88'
McGinn beats challenges aplenty in the middle before sending Bailey on a run forward. He cuts inside and looks to square for Watkins, but Madueke gets back to hook the ball behind for a corner!
87'
L. Dendoncker enters the game and replaces Douglas Luiz.
Luiz is next off for Villa, and he's replaced at the base of their impressive midfield by Leander Dendoncker.
84'
C. Chambers gets yellow.
Chambers looks to waste a touch of time by preventing Chelsea taking a throw-in, and is booked accordingly by the referee.
80'
C. Gallagher enters the game and replaces M. Kovačić.
C. Pulišić enters the game and replaces Marc Cucurella.
Cucurella also comes off, and Christian Pulisic continues his return from injury with a late cameo as Chelsea look to save this game.
That wayward shot was Kovacic's last action, as the Chelsea captain comes off for Conor Gallagher to see out the game.
78'
Young pulls up with cramp, delaying the taking of a Chelsea corner, and Chilwell's not happy with him one bit - the referee has to separate the two to prevent further escalation!
76'
L. Bailey enters the game and replaces E. Buendía.
Buendia comes off in Villa's latest change, and Leon Bailey, who started their last game against Bournemouth, enters the fray.
Minute
Description
73'
Felix links up with Chilwell in the box, and he steps inside Chambers before hitting the deck. It'd be a soft penalty to give, and the referee agrees, waving play on immediately.
70'
Madueke hangs up a cross from the right, but the ball's far too close to Martinez and the Villa goalkeeper gathers.
69'
Kante is found in space on the right, but his attempted cross is blocked. He recovers possession to tee up Fernandez, whose ball into the centre is headed back across goal by Havertz before Villa clear!
68'
E. Fernández gets yellow.
McGinn attempts to escape the attention of Fernandez in midfield, but he's caught late and from behind by the Chelsea midfielder, who is shown a yellow card.
60'
Koulibaly rises highest at the corner, but can only glance his near-post header over the crossbar!
57'
N. Madueke enters the game and replaces M. Mudryk.
N. Kanté enters the game and replaces R. Loftus-Cheek.
Mudryk also comes off, and is replaced by a fellow January signing in Noni Madueke.
Chelsea ring the changes following that second Villa goal - the first seeing Loftus-Cheek replaced by N'Golo Kante.
56'
J. McGinn has scored a goal for Aston Villa! Assist by J. Ramsey.
Ramsey showed great composure to make the pass for McGinn there rather than shoot for himself - he certainly knows what the Villa captain is capable of!
GOOOOOOOOOOAAAAALLLL!!!!! What a strike that is from McGinn!!! A poor Luiz corner is kept alive by Ramsey, who plays the ball across the edge of the box. McGinn arrives to strike it first time, and curls the ball through the crowd, beyond Kepa, and into the bottom corner!!! A thumping beauty of an effort, and one which doubles Villa's advantage to go 2-0 up at Stamford Bridge!
54'
B. Chilwell gets yellow.
Loftus-Cheek's ball into the middle is cut out and Luiz looks to counter down the left for Villa. Chilwell races across and nudges the Brazilian off the ball illegally, warranting a yellow card from the referee's pocket.
53'
Havertz can't control Kovacic's floated pass into the box and loses out to Mings, who tries to stride out of defence before being clipped late by Felix.
48'
Mudryk latches onto Kovacic's pass and beats both Mings and Konsa, but drags the latter to ground in the process and the free-kick goes Villa's way.
46'
C. Chambers enters the game and replaces B. Kamara.
Kamara was given a torrid time in midfield for large spells of that first-half, and the Frenchman, booked inside the first four minutes, is replaced by Calum Chambers.
Felix kicks off the second half, and we're back underway in west London!
45' +2
HALF-TIME: CHELSEA 0-1 ASTON VILLA.
45'
We're into two added minutes at the end of this action-packed first 45 minutes.
43'
Loftus-Cheek cuts inside from the right before playing in Havertz down the same side, but his cut-back into the area is headed clear by Kamara.
39'
M. Kovačić gets yellow.
Young attempts to race away from Kovacic down the near touchline, but is pulled back by the Chelsea captain, who is shown a yellow card.
37'
Felix is in space on the edge of the area and his shot is blocked via the back of Konsa, but Mudryk and Chilwell can't make anything of the ball bouncing their way.
31'
Ramsey picks the pocket of Fernandez in midfield and races into the clear, but Koulibaly gets across in cover to win the ball back just in time!
27'
A loose Felix pass breaks for Ramsey at the other end, and the Villa youngster charges into the area before being dispossessed by a perfectly timed James tackle!
24'
A long ball picks out the run of Chilwell into the Villa box, but he goes down under pressure from Kamara and demands a penalty! There's nothing coming his way though, as the referee calls play on!
18'
O. Watkins has scored a goal for Aston Villa!
GOOOOOAAAALLL!!!! Villa strike first!!! It's a horrible goal from Chelsea's concern, as Luiz's long ball results in a mix-up between Koulibaly and Cucurella. The latter's header behind allows Watkins to race away untouched, chipping the ball over a stranded Kepa to make it 1-0 to the visitors!
16'
Chelsea's corner is headed away as far as Kovacic, who arrives on the edge of the box to slice a volleyed scissor-kick well wide of the target!
14'
Villa make another burst forward from midfield and Ramsey surges down the left. He takes on James and beats the England defender before crossing, but his low ball across the face is cleared by Koulibaly!
13'
Moreno prevents a hard-running Loftus-Cheek from beating him on the inside, but his sliding challenge can't prevent the conceding of a corner.
10'
Felix and Mudryk play a clever one-two before the former attempts to tee up Kovacic, but the Croatian is beaten to the ball by Kamara and Villa clear their lines.
4'
B. Kamara gets yellow.
And we do have an early booking! Luiz's delivery floats straight to Kepa, who throws the ball out to Havertz on the counter. He races out of his own half but is caught from behind by Kamara, who is shown a fourth-minute yellow card by the referee.
3'
Ramsey bursts forward on the break for Villa, but has his heels clipped by Fernandez 30 yards from goal. The most expensive player in English football history was very lucky to avoid a yellow card there!
2'
Chelsea win possession in midfield and Havertz's cut-back from the left deflects away from danger. Kovacic arrives to strike the ball first time, but sends his wayward shot high and wide of the target.
1'
Buendia kicks off for the Villains, and we are off and running at Stamford Bridge!
Hello, and welcome to live coverage of this Premier League fixture between Chelsea and Aston Villa at Stamford Bridge.
Also under a new coach in Unai Emery, Villa have been able to avoid the log-jam of relegation-threatened teams directly below them, and a win in west London would take them up to ninth in the table, leapfrogging both Chelsea and Fulham in the process.
CHELSEA SUBS: Marcus Bettinelli, Benoit Badiashile, N’Golo Kante, Christian Pulisic, Trevoh Chalobah, Mason Mount, Conor Gallagher, Carney Chukwuemeka, Noni Madueke.
ASTON VILLA SUBS: Viljami Sinisalo, James Wright, Diego Carlos, Bertrand Traore, Calum Chambers, Jhon Duran, Lucas Digne, Leon Bailey, Leander Dendoncker.
ASTON VILLA (4-2-3-1): Emiliano Martinez; Ashley Young, Ezri Konsa, Tyrone Mings, Alex Moreno; Douglas Luiz, Boubacar Kamara; John McGinn, Emiliano Buendia, Jacob Ramsey; Ollie Watkins.
Also under a new coach in Unai Emery, Villa have been able to avoid the log-jam of relegation-threatened teams directly below them, and a fourth win in just five games would take them up to ninth in the table, leapfrogging both Chelsea and Fulham in the process.
The teams are out on the pitch, and kick-off is just moments away in the capital!
CHELSEA (3-4-2-1): Kepa Arrizabalaga; Ruben Loftus-Cheek, Kalidou Koulibaly, Marc Cucurella; Reece James, Enzo Fernandez, Mateo Kovacic, Ben Chilwell; Kai Havertz, Mykhailo Mudryk; Joao Felix.
The teams are back out for the second 45 minutes, and can Chelsea convert their first-half domination into some second-half goals?
That's all from us, we hope you enjoyed the game. Until the next one, it's goodbye for now.
A massive three points away from home sends Villa sky-rocketing into ninth place in the Premier League, overtaking Chelsea and Fulham to sit just one point behind Liverpool in eighth. As a result, Chelsea drop into the bottom half, with the pressure on Graham Potter growing with every passing week of the Blues' season to forget.
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