West Ham won 4-1 at Boreham Wood to get their pre-season underway.
Goals in the first half from Danny Ings and Kamarai Swyer were followed by second-half finishes from Jarrod Bowen and Gideon Kodua.
The hosts got a consolation for the 2,700 in attendance via Femi Ilesanmi but it wasn't enough to get the better of a strong West Ham side.
Lukasz Fabianski, Kurt Zouma, Angelo Ogbonna, Aaron Cresswell, Pablo Fornals, and Gianluca Scamacca all started in the rout for the Hammers at Meadow Park, with Emerson coming off the bench.