Tammy Abraham scored a stoppage-time equaliser to complete an incredible comeback and rescue a point for Chelsea at West Bromwich Albion after they had trailed 3-0 at half-time.
In a thrilling match, West Brom looked to be heading for their first win back in the Premier League after racing into a commanding lead inside the opening 30 minutes at The Hawthorns.
A mistake by Marcos Alonso led to the hosts' first, Matheus Pereira feeding Callum Robinson to produce a classy finish past Willy Caballero, who was starting in place of dropped £71m keeper Kepa Arrizabalaga.
Thiago Silva, who was making his Premier League debut for Chelsea, was then too casual in possession, allowing Robinson to pounce and run at goal before doubling the lead with another impressive finish.
Remarkably, it was quickly 3-0 as Kyle Bartley was left unmarked to tap home inside the six-yard box after the visitors failed to deal with a corner.
But Frank Lampard's side rallied after the break and Mason Mount reducing the deficit from 20 yards.
Substitute Callum Hudson-Odoi set up a tense finale with a stylish finish, before Abraham, making his first top-flight start of the season, tapped home the equaliser in the 93rd minute after Mount's shot had been saved.Reaction from The Hawthorns, plus the rest of Sunday's Premier League actionChelsea sign Rennes keeper Mendy
Mixed feelings for Lampard
Blues boss Frank Lampard looked furious slumped in his seat in the dugout after sending his players out early for the start of the second half following a horrific defensive display.
Having been handed the captain's armband on his first Premier League appearance since arriving on a free transfer, this was supposed to be a day to remember for 36-year-old Brazil centre-back Silva.
Instead, his mistake allowed Robinson to get his second after the former Sheffield United forward had broken the deadlock following Alonso's careless header.
It went from bad to worse when no-one picked up defender Bartley to make it 3-0, before Chelsea finally got a grip.
As bad as they were at the back, Lampard's side were always a threat going forward.
Timo Werner had already hit the bar when Baggies keeper Sam Johnstone was left rooted to his line by Mount's finish, which launched the comeback.
Hudson-Odoi's classy finish left West Brom a bag of nerves, although it took until the third minute of stoppage time for Abraham to equalise.
Despite spending £200m-plus on strengthening his squad, Lampard still has work to do if Chelsea are to claim another top-four finish.
Having lost against champions Liverpool last weekend, they have dropped five points in their past two games and looked a complete mess during a shambolic first 45 minutes.
More to follow.
Player of the match
with an average of 7.40
West Bromwich Albion
Squad number7Player nameRobinson
Squad number12Player nameMatheus Pereira
Squad number11Player nameDiangana
Squad number6Player nameSemi Ajayi
Squad number5Player nameBartley
Squad number8Player nameLivermore
Squad number27Player nameO'Shea
Squad number14Player nameTownsend
Squad number2Player nameFurlong
Squad number19Player nameSawyers
Squad number4Player nameRobson-Kanu
Squad number1Player nameJohnstone
Squad number28Player nameField
Squad number10Player namePhillips
Squad number20Player nameHudson-Odoi
Squad number19Player nameMount
Squad number9Player nameAbraham
Squad number29Player nameHavertz
Squad number28Player nameAzpilicueta
Squad number7Player nameKanté
Squad number11Player nameWerner
Squad number18Player nameGiroud
Squad number24Player nameJames
Squad number17Player nameKovacic
Squad number4Player nameChristensen
Squad number13Player nameCaballero
Squad number6Player nameThiago Silva
Squad number3Player nameAlonso
West Brom1Johnstone2FurlongBooked at 82mins6Ajayi5Bartley27O'Shea14Townsend12Costa PereiraSubstituted forFieldat 90+1'minutes8Livermore19Sawyers11DianganaSubstituted forPhillipsat 74'minutes7RobinsonSubstituted forRobson-Kanuat 66'minutes
Chelsea13Caballero24JamesBooked at 27mins4ChristensenBooked at 86mins6Thiago SilvaSubstituted forGiroudat 73'minutes3AlonsoBooked at 8minsSubstituted forAzpilicuetaat 45'minutes7Kanté17KovacicSubstituted forHudson-Odoiat 45'minutes19Mount29Havertz11Werner9Abraham
Match ends, West Bromwich Albion 3, Chelsea 3.
Second Half ends, West Bromwich Albion 3, Chelsea 3.
Corner, Chelsea. Conceded by Romaine Sawyers.
VAR Decision: Goal Chelsea - West Bromwich Albion 3-3 Chelsea (Tammy Abraham).
Goal! West Bromwich Albion 3, Chelsea 3. Tammy Abraham (Chelsea) left footed shot from very close range to the centre of the goal following a corner.Goal confirmed following VAR Review.
Attempt saved. Mason Mount (Chelsea) right footed shot from the centre of the box is saved in the centre of the goal.
Corner, Chelsea. Conceded by Conor Townsend.
Attempt blocked. Timo Werner (Chelsea) right footed shot from the centre of the box is blocked.
Corner, Chelsea. Conceded by Dara O'Shea.
Substitution, West Bromwich Albion. Sam Field replaces Matheus Pereira.
Attempt saved. Timo Werner (Chelsea) right footed shot from outside the box is saved in the bottom left corner. Assisted by Callum Hudson-Odoi.
Andreas Christensen (Chelsea) is shown the yellow card for a bad foul.
Foul by Andreas Christensen (Chelsea).
Hal Robson-Kanu (West Bromwich Albion) wins a free kick in the defensive half.
Foul by Reece James (Chelsea).
Matheus Pereira (West Bromwich Albion) wins a free kick on the left wing.
Darnell Furlong (West Bromwich Albion) is shown the yellow card.
Olivier Giroud (Chelsea) wins a free kick in the defensive half.
Foul by Matt Phillips (West Bromwich Albion).
Attempt blocked. Matt Phillips (West Bromwich Albion) right footed shot from outside the box is blocked.
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