Chelsea started the day in fourth place, two points ahead of West Ham United. After Thiago Silva was thrown, Chelsea had to play with 10 men for more than an hour.
Despite this numerical disadvantage, Christian Pulisic gave Chelsea the lead, but two goals from Costa Pereira – both during the break in the first half – kept the visitors ahead at half time.
A brilliant volley from substitute Callum Robinson extended West Brom’s lead and then Mbaye Diagnes’s fine finish added a fourth before Mason Mount’s onboarding reduced the deficit.
This was the 59th goal in 30 games West Brom has conceded in the league this season, but the guests didn’t panic and Robinson scored his second goal with a skillful finish in the final minutes of the game.
Later on Saturday, Liverpool struck a 3-0 win at Arsenal thanks to a brace from Diogo Jota and a goal from Mo Salah. All three goals came in the second half.
The win put Liverpool in fifth place, two points behind Chelsea, and each club had eight league games to go.
Premier League leaders Manchester City took third place in Leicester City with goals from Benjamin Mendy and Gabriel Jesus in the second half with a 17-point lead thanks to a 2-0 win.
City now only needs 11 points from seven games to win the title.
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The win at Chelsea keeps West Brom’s hopes of survival alive, bringing Sam Allardyce’s side to 21 points, seven off Newcastle United’s fourth.
“It’s an amazing day,” Robinson told BT Sport. “It’s been a tough season but it’s nice to come here and score so many goals and really enjoy it. It’s a good day all round.”
West Brom’s win ended Chelsea’s undefeated run in 14 games under Thomas Tuchel. It’s the first time Tuchels have lost Chelsea since replacing Frank Lampard.READ: From Manchester United to Fruit Delivery: David Moyes’ Long Journey to the East End of London
“It wasn’t our day”
According to Tuchel, Silva’s red card was the game’s turning point.
“After that, we couldn’t cope with the situation,” TucheI told BT Sport. “I do not know why.
“We gave away two very easy goals. What could go wrong went wrong after the red card. We have to accept the big loss. We made big mistakes before the two yellow cards. There were too many light ball losses. It was impossible for us to accept the situation, “added Tuchel.
“Every shot was a goal from them. It was clearly not our day today. We will get the right answer. First of all, it is important that we digest it. I didn’t see it coming, now we have to take our responsibility – abstain.” – and shake it off. “
Robinson has scored five Premier League goals this season, and notably, they were all against Chelsea. The game between the two teams at West Brom’s Hawthorns Stadium in September ended 3-3 after Chelsea battled 3-0 down.
“We are very pleased and pleased with the way the players used our tactics and how we tried to control Chelsea’s attacks,” West Brom manager Sam Allardyce told BT Sport. “I have to say because we got so good in possession and the quality of the finish that we took a well-deserved win.”
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“People will always make sure they’re down to 10 men. But I thought we started the game well and created opportunities. I thought Thiago Silva was lucky enough to continue after the first foul,” added Allardyce.
“Our goals were all quality goals – not just the finishing but the builds too. It’s just a shame we haven’t shown that quality in a few other games. But that still gives us a bit of hope.”