Sebastien Haller’s first two goals for West Ham United helped secure a 3-1 win over Watford.
Mark Noble opened the scoring after three minutes, converting a penalty after Abdoulaye Doucoure had fouled Manuel Lanzini.
Watford responded brightly, with Gerard Deulofeu hitting the bar before Andre Gray levelled in the 17th minute.
Will Hughes missed a glorious opportunity early in the second half to put Watford ahead, blazing over from two yards.
Haller made them pay, finishing Felipe Anderson’s cutback on 64 minutes before a close-range bicycle kick nine minutes later confirmed the Hammers' first win of the season.
See: Watford report | West Ham report
Next fixtures
Watford: 31 Aug v Newcastle (A)
West Ham: 31 Aug v Norwich (H)
Referee: Chris Kavanagh Assistants: Dan Cook; Sian Massey-Ellis Fourth official: Darren Bond VAR: Jarred Gillett Assistant VAR: Stephen Child.