West Ham 1-0 Watfordpublished at 27 mins
West Ham are down to 10 men temporarily as Mark Noble gets some attention to a gash on his hand.
The Hammers skipper is eager to get back out there but that's a nasty cut.
Summary
West Ham XI: Adrian; Byram, Collins, Reid, Masuaku, Noble, Kouyate, Antonio, Lanzini, Payet, Zaza.
Watford XI: Gomes, Cathcart, Kaboul, Britos; Janmaat, Capoue, Pereyra, Behrami, Holebas, Deeney, Ighalo.
West Ham 1-0 Watfordpublished at 27 mins
West Ham 1-0 Watfordpublished at 26 mins
Dimitri Payet needlessly gives away possession on the halfway line but Daryl Janmaat's ball through to Troy Deeney is slightly overhit and West Ham goalkeeper Adrian comes out to clean up.
West Ham 1-0 Watfordpublished at 24 mins
Dimitri Payet hits his free-kick straight into the wall and then drags his attempt wide when it comes back to him.
'A much more exciting team with Payet'published at 23 mins
West Ham 1-0 Watford
Kevin Kilbane
Former Everton and Sunderland winger on Final ScoreI can't take my eyes off this game. The Hammers are a much more exciting team with Payet in it - he seems to inspire his team-mates.
West Ham 1-0 Watfordpublished at 22 mins
All West Ham at the moment as Michail Antonio has a shot charged down from outside the area and then Odion Ighalo fouls Mark Noble 25 yards out.
Dimitri Payet territory.
West Ham 1-0 Watfordpublished at 19 mins
Manuel Lanzini's improvised shot from the edge of the area goes just wide.
That would have been some goal from the West Ham man as he powerfully flicked the ball with his right foot.
West Ham 1-0 Watfordpublished at 16 mins
It's 50 metres from the touchline back to the dugouts at the London Stadium.
West Ham boss Slaven Bilic has set up camp at the end of his technical area so he might need to text one of his assistants if he wants a drink.
West Ham 1-0 Watfordpublished at 12 mins
Debutant Simone Zaza marks his first game in England by picking up his first fine.
The Italian punches the ball away after a decision goes against him and is shown a yellow card.
West Ham 1-0 Watfordpublished at 11 mins
Another chance for Odion Ighalo!
Again Roberto Pereyra is the architect and this time the Nigerian makes a clean contact with his shot but it's straight at Adrian.
West Ham 1-0 Watfordpublished at 9 mins
It's non-stop here.
Odion Ighalo should level for the visitors after Roberto Pereyra plays him in but Arthur Masuaku manages to get back to stop him tapping in.
West Ham 1-0 Watfordpublished at 8 mins
What on earth is Daryl Janmaat doing?!
Michail Antonio drills a low cross across the face of goal and the Dutchman inexplicably passes it against his own post
GOAL - West Ham 1-0 Watfordpublished at 6 mins
Michail Antonio
Well, we were talking before the game about how dangerous Michail Antonio is with his head and he's just shown why again.
The England call-up is unmarked from Dimitri Payet's corner and his deflected header creeps past Gomes.
West Ham 0-0 Watfordpublished at 4 mins
At the other end Odion Igalo drives a low effort into the side netting from a tight angle.
Just two league goals in 2016 for the Nigerian.
West Ham 0-0 Watfordpublished at 2 mins
Nearly a fantastic start here from West Ham.
Michail Antonio is released by an overhead kick from debutant Simone Zaza and forces a low save from Gomes.
The ball comes back to West Ham but Gomes is equal to Dimitri Payet's deflected effort.
West Ham 0-0 Watfordpublished at 15:01 British Summer Time 10 September 2016
Watford get us under way.
'I fancy the Hammers to win'published at 14:58 British Summer Time 10 September 2016
West Ham v Watford (15:00 BST)
Kevin Kilbane
Former Everton and Sunderland winger on Final ScoreWest Ham haven't been their usual dynamic selves this season. But Dimitri Payet will inject something really exciting today. I fancy the Hammers to beat Watford
Unhappy hunting ground for Hornetspublished at 14:57 British Summer Time 10 September 2016
West Ham v Watford (15:00 BST)
Of course, all those games took place at Upton Park and not the Hammers' new home the London Stadium.
Room for improvement?published at 14:53 British Summer Time 10 September 2016
West Ham v Watford (15:00 BST)
We asked supporters of Premier League and Scottish Premiership clubs to use BBC Sport's team selector to tell us whether they were satisfied with their squad, via a simple tick or cross for each position.
Hammers fans are satisfied with the defence, delighted with the midfield, and worried about the attack.
At Watford, 97.3% of fans were happy with the left-hand side of the three centre-backs in their 3-5-2 formation. No other outfield position was rated so highly.
Image source, BBC SportBack post!published at 14:49 British Summer Time 10 September 2016
West Ham v Watford (15:00 BST)
Image source, ReutersWho's the most dangerous player in the air in the Premier League. Andy Carroll?
Right club. Wrong man. In fact Michail Antonio has scored a league-high eight headed goals since the start of last season.
Indeed, no English midfielder has scored more Premier League goals than Antonio since August 2015 (10, level with Dele Alli).
Commentator's notespublished at 14:45 British Summer Time 10 September 2016
West Ham v Watford (15:00 BST)
Jonathan Pearce
Match of the Day commentator at the London Stadium"Both clubs have concerns. It'll take time for West Ham to settle at their new stadium. Moving Slaven Bilic's dugout closer to the touchline would help - he is so isolated from his players.
"He also needs to find a settled side, having used five formations in all competitions so far.
"Watford have turned over 50 transfers in 13 months - too many. They look muddled. Two league wins in 15 is also deeply concerning.
"Of the new boys, West Ham's Zaza didn't impress at Juventus, unlike Watford's Okaka at Anderlecht. He once scored a winner for Fulham against West Ham. Could he inspire another victory?"