West Ham without a win in four games
Watford unbeaten in last two league games
Patrice Evra starts on the bench for West Ham
West Ham 2-0 Watford
A good day for David Moyes and his West Ham players while Javier Gracia tastes his first league defeat in charge of Watford.
You can read a report of this game on the BBC Sport website.
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West Ham 2-0 Watford
Three additional minutes. Watford are all but beaten.
West Ham 2-0 Watford
A home debut for Jordan Hugill and a standing ovation for Javier Hernandez as he departs.
Patrice Evra will have to wait to make his Hammers debut as David Moyes has used all three substitutes after Declan Rice replaced Arnautovic.
West Ham 2-0 Watford
It's around six hours since Watford's travelling fans last saw their side score away from home.
West Ham 2-0 Watford
Leon Osman
Former Everton midfielder on Final Score
It was terrible defending from Watford, the two centre-halves just allow Marko Arnautovic to wander into the box, they leave him unmarked, and when the ball falls to him, it's easier for him to score than miss.
Marko Arnautovic
Marko Arnautovic gets the goal his work-rate thoroughly deserves after a fine individual performance.
It's a simple tap-in after watford keeper Orestis Karnezis spills a cross.
Watford are heading for defeat despite a decent second half showing.
Image source, ReutersWest Ham 1-0 Watford
Dodi Lukebakio is on for Watford in place of Gerard Deulofeu.
No sign of Patrice Evra for West Ham.
West Ham 1-0 Watford
How is it not 2-0?
Javier Hernandez is clean through and cuts inside but Orestis Karnezis keeps his composure and smoothers the danger before Marko Arnautovic can tap home.
West Ham 1-0 Watford
A vital headed clearance by James Collins. Pablo Zabalata goes down after a challenge and takes an age to climb to his feet allowing his team-mates some breathing space.
West Ham 1-0 Watford
Watford are hammering at West Ham's door. The hosts are looking fragile despite their lead and need a second goal. Daryl Janmaat's crosses are causing chaos.
West Ham 1-0 Watford
Around half an hour remaining. Watford have had 57% possession but West Ham have the lead.
Image source, Rex Features#bbcfootball or text on 81111
Bayo Omisore: Michail Antonio is a fantastic footballer. I can't see why he’s not in the England team. So underrated, in my opinion.
West Ham 1-0 Watford
Gerard Deulofeu goes for glory from a free-kick and brings a tidy save from Adrian. Watford are far from finished.
West Ham 1-0 Watford
Marvin Zeegelaar's uncomfortable afternoon is over as Watford introduce Roberto Pereyra - the first change by the visitors.
West Ham 1-0 Watford
Marko Arnautovic has been impressive for the Hammers. He produces another super run which results in a corner and another huge roar from West Ham's fans
Image source, Rex FeaturesWest Ham 1-0 Watford
Totally wasted by Gerard Deulofeu who fires straight into the claret and blue wall. Deary me. That was awful.
West Ham 1-0 Watford
The Hornets are straight out of the blocks and Troy Deeney is fouled just outside the West Ham penalty area.
Big chance for Watford.
West Ham 1-0 Watford
Will Watford rescue this?
We're back under way.
West Ham 1-0 Watford
A decent 45 minutes by the Hammers. Watford have work to do.
Image source, Getty ImagesWest Ham 1-0 Watford
Watford have had 56% possession but Adrian Mariappa's header, which produced a smart save, is the closest they have come.