West Ham crowned Chelsea hosts, beating them (3-1) on Sunday night, at the London Olympic Stadium, in the second round of the Premier League.
West Ham scored Nave Akrad in the 7th minute, Mikel Antonio (53), and Luis Paqueta (90 + 5), while Carney Chukwuemeka scored Chelsea's only goal (38).
West Ham raised their balance to 4 points, finishing sixth, while Chelsea's balance settled at one point in 14th place.
West Ham had an early chance in the sixth minute when Ward Bruce took a corner, which Zuma followed with his head to reach Bowen, but goalkeeper Robert Sanchez kept the ball out in time.
But West Ham substituted the opportunity one minute later, through another corner of Ward Bruce, followed by Moroccan Akrad with his head in the net.
The referee awarded a penalty to Chelsea, before reversing the decision after using video technology in the 10th minute, due to an infiltration of Jackson.
Chilwell lifted a cross, reaching Jackson, who headed it over West Ham's goal in the 15th minute.
Chelsea came close to equalizing in the 25th minute, following Enzo Fernandez's cross, which Chilwell followed with a header next to the right post.
Chelsea tied the cuff in the 28th minute, when Chukwuemeka took advantage of Chilwell's cut pass, to get rid of his sergeant on the left, before firing a powerful ball with his right that settled into the net.
Chelsea continued their pressure, Colwell's header drifting away from West Ham after a cross from Enzo Fernandes in the 32nd minute, Jackson clawed his way into the right, passing a ball in front of the goal that did not receive a follow-up in the 34th minute.
A low shot from Paqueta passed alongside Chelsea's goal in the 38th minute, after which the referee awarded the Blues a penalty after Sterling was blocked. Still, West Ham keeper Alfonso Areola saved Enzo Fernandes' 43rd-minute kick.
Chelsea almost added the second goal, when Sterling got rid of Emerson, before sending a pass that Jackson failed to follow, to reach Chilwell, whose attempt bounced back from defense in the stoppage time of the half, who last witnessed Chukwuemika's injury exit.
West Ham regained their lead 8 minutes into the second half when Ward Bruce took advantage of a cut ball in the middle of the pitch to send it straight to Antonio, who advanced it and fired a shell toward the far post of Chelsea's goal.
Pochettino realized his need to strengthen his midst, engaging debutant Moises Caicedo in place of Chilwell, and the Equardoi international fired a ball from outside the box over the goal with a 62-minute drive.
Pressure increased on the Hammers after Akrad's defender was sent off in the 67th minute for his second yellow card after being blocked by Jackson.
Nuno Maduecki took part in Chelsea's squad instead of Gallagher, and goalkeeper Sanchez blocked West Ham winger Bowen's shot in the 79th minute, Lerd Colwell with a similar shot that went next to the post in the 80th minute.
Chelsea substitute Mikhailo Modric was unable to exploit Sterling's distinctive cross in the 85th minute, and West Ham substitute Pablo Fornales almost added a third goal for his side, after an individual effort that ended with a shot blocked by goalkeeper Sanchez in the first minute of stoppage. time.
Ariola maintained West Ham's victory when Maduiki ably blocked a rebound shot from a defender's foot in the third minute of stoppage time before the referee awarded a penalty for West Ham after Emerson was blocked by Caicedo, and Paqueta took the kick for a 90th + 5th- minute success.