And despite Ings and Mo Kudus both threatening from headers inside the final five minutes, the result was sealed – again on the counter – when Mateta charged across the halfway line and slipped Nketiah in with an inch-perfect pass, the No. 9 getting cleaned out by the grasping Fabiański.
Up stepped Mateta again. And although his kick appeared to be saved by Fabiański, it rolled over the line in front of the away supporters, with Mateta strolling over the send another corner flag into the stratosphere.
Palace were then comfortable as the game went into injury time, with their second 2-0 away win in the space of four days marking the Eagles' first back-to-back wins of the season – and a first London derby away win since our late winner on the same ground in November 2022.
West Ham: Fabiański (GK), Wan-Bissaka, Mavropanos, Kilman, Cresswell (Scarles, 57), Emerson (Orford, 57), Rodríguez (Soler, HT), Álvarez (Luis Guilherme, 83), Souček, Kudus, Paquetá (Ings, 57).
Subs: Areola (GK), Coufal, Casey, Irving.
Palace: Henderson (GK), Muñoz, Richards, Lacroix, Guéhi, Mitchell, Kamada, Hughes (Clyne, 90), Eze (Nketiah, 78), Sarr (Devenny, 68), Mateta (Schlupp, 90).
Subs: Turner (GK), Riad, Kporha, Rodney, Doucouré.
As It Happened