New boy Sebastien Haller scored twice as West Ham won 3-1 at Watford, who remain bottom of the table and without a point.
Skipper Mark Noble gave the Hammers a third-minute lead from the penalty spot, 15 years to the day since he made his debut for the club.
Gerard Deulofeu struck the woodwork before setting up Andre Gray for a fine 17th-minute finish.
But Haller, the £45million summer signing from Eintracht Frankfurt, proved the Hammers' hero with goals after 64 and 73 minutes, his second an impressive acrobatic effort.
Watch highlights from today’s match at Vicarage Road in the video at the top of the page.
