West Ham United claimed a rousing London derby win against big-spending Chelsea despite playing almost 30 minutes with only 10 men.
The Hammers were 2-1 ahead when defender Nayef Aguerd, who opened the scoring with a seventh-minute header, was sent off in the 67th minute for his second bookable offence.
But Chelsea could not force an equaliser and then conceded a late third through Lucas Paqueta’s penalty in the fifth minute of added time.
Teenager Carney Chukwuemeka scored his first goal for the Blues to make it 1-1 but Enzo Fernandez wasted a chance to put them ahead when his penalty was saved by Alphonse Areola.
Michail Antonio put West Ham back in front with a powerful angled strike in the 53rd minute, before the hosts were reduced to 10 men.
However, Pochettino’s side could not use their man advantage to force a second leveller, despite a second-half debut for midfielder Moises Caicedo, who joined from Brighton earlier this week in a deal which could become a British record.
The Ecuador midfielder signed for an initial £100m even though the deal could be worth up to £115m, and he had a chance to make it 2-2 but shot over from the edge of the penalty area.
Caicedo then conceded a penalty with a foul on Emerson and Paqueta scored from the spot to seal West Ham’s victory.
This was West Ham’s first game at London Stadium since they won the UEFA Europa Conference League – their first major honour since 1980.