Ten-man West Ham recorded a thrilling 3-1 win over rivals Chelsea to leave Mauricio Pochettino still waiting for his first victory in charge of the west London club.
Nayef Aguerd nodded West Ham into a seventh-minute lead, taking advantage of some non-existent Chelsea marking to head home debutant James Ward-Prowse's inch-perfect corner kick, before Carney Chukwuemeka - later subbed with a knee injury - levelled with a delicious strike, the 19-year-old's first in the Premier League.
In fact, the Blues - who resisted the temptation to hand Moises Caicedo his debut after his recent British-record transfer from Brighton - really should have gone in ahead at the break, only for Enzo Fernandez to see his poorly struck penalty saved by Alphonse Areola on the stroke of half-time.
That proved key as against the run of play, Michail Antonio slammed the hosts back in front eight minutes after half-time and despite Aguerd then seeing red midway through the second half after a second yellow, the Hammers held on for a rousing win, sealed by Lucas Pacqeta's stoppage-time penalty after a foul by Caicedo on Emerson.
Paqueta started for West Ham, with Manchester City's move for the midfielder on hold because of concerns surrounding an FA and FIFA betting investigation.
