Dylan Tombides scored the only goal of the game as West Ham United defeated Arsenal 1-0 in the FA Premier Academy League.
The Australia U17 striker was on target following a flowing move down the right flank involving George Moncur and Blair Turgott.
Academy Director Tony Carr MBE was delighted with his side's display as they followed up a 3-2 victory over Chelsea with another outstanding result.
"It was our best performance of the season. It was a very good all-round team display and a great day," Carr confirmed.
"In terms of our togetherness, we could be faulted. Arsenal could not have complained if we'd won three or four-nil. It all came together in terms of our work ethic and football. I'm very pleased.
"Our goal was superb. It was a good move down the right-hand side. George Moncur played in Blair Turgott and he squared for Dylan, who controlled and drilled a right-foot shot into the net."
West Ham U18s go to Portsmouth for a re-arranged match on Friday before travelling to Norwich City on Saturday 4 December and hosting Aldershot Town at the Boleyn Ground in the FA Youth Cup third round on Tuesday 7 December.
West Ham United U18s: Mehmet, Modelski (Chambers 75), Driver, Hunt, Sanchez, Moncur, Wearen, Turgott, Lletget (Hall 80), Tombides (Hurley 82), Vose