All over. Watford have to settle with a point despite a dominant display.
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Allan Nyom has had a good game but he goes into the book for a cynical trip.
Three minutes added time. Saido Berahino is replaced by Callum McManaman.
Is that the last chance? Almen Abdi takes a swing from 20 yards but his effort dribbles tamely into the gloves of Boaz Myhill.
West Brom are pressing in the closing stages. Allan Nyom is forced to concede a corner but it's well headed clear. Then Salomon Rondon tries to play in James Morrison but Gomes races out of his goal to claim.
Etienne Capoue gives away a free kick in a dangerous area. Chris Brunt can take a mean dead ball but he's off target on this occasion, not getting enough dip and curl on his strike to take the ball under the crossbar.
Interesting...Quique Sanchez Flores withdraws Jose Jurado, who has been arguably his side's best player, and throws on Steven Berghuis for his debut.
What a chance. What a chance. West Brom have barely had a sniff all match but they should be 1-0 up. The Baggies work a short corner cleverly, Chris Brunt stands up a cross to the back post, where it's nodded back across goal by Rickie Lambert. All Saido Berahino has to do is head the ball goalwards from four yards out but he mistimes his leap and squirts the ball wide. What a let-off for Watford.
Nyom has got a terrific delivery on him - Almen Abdi puts him in on the overlap and he lazily swings his boot at the ball and produces a beaut of a cross that Chris Brunt has to head to safety.
Is fatigue beginning to take its toll on Watford? For the first time in the game they are beginning to misplace a few passes, Ikechi Anya the latest culprit with an overhit cross.
A rather scrappy passage of play ends with Troy Deeney regaining possession on the edge of the area and sending a rising drive over the top of the crossbar. Watford will have to do better than that.
I've just had a look at the stats and I wasn't entirely surprised to find that West Brom haven't had a shot on target yet. It's been that sort of day for Tony Pulis's men. About the best you can say is that they've been resilient, and of course, they are still right in this game.
How many chances can Watford spurn? Ikechi Anya whips in a lovely cross right into the heart of the West Brom area, but Odion Ighalo can't quite stretch enough to guide his diving header into the net. You just wonder if Watford will rue all these missed opportunities.
Rickie Lambert lunges in desperately and very, very late on Valon Behrami. It's not malicious, but the West Brom striker can have few complaints about his place in the referee's notebook.
Allan Nyom has played as well as anybody today. For the umpteenth time he surges upfield and pings in a great cross, but there's no-one in the middle to turn it home. Is it going to be one of those days for Watford?
Goodness me, what an introduction that would have been! Barely 60 seconds after coming on, Salomon Rondon finds himself all alone in the space vacated by Ikechi Anya. He cuts inside the centre-back and goes for goal, but his effort rises over the crossbar. It's the closest West Brom have come.
Here he is! West Brom's record signing Salomon Rondon enters the fray, replacing Craig Gardner. He'll play up top for the Baggies.
Will he be the man to break the deadlock today?
West Brom really are living dangerously here. They allow Ikechi Anya to stroll to the byline and send over a teasing cross which is headed back across goal by Troy Deeney before Odion Ighalo's effort is blocked on the line. Watford sniffing a breakthrough here...
West Brom can't stop Jose Jurado - not legally at least. The Spanish midfielder has been a cut above today and Craig Dawson is forced to chop him down. West Brom clear the free kick, but there's no-one upfield and Watford have it straight back.
Quique Sanchez Flores is first to show his hand. Almen Abdi replaces Miguel Layun for Watford.
BBC WM Sport
The passing’s been poor. It was a criticism of his team by Tony Pulis last season – when they had the ball they just weren’t able to keep it well enough, and it’s the same today.
Now then, referee! James Morrison slides a dangerous through ball into the area, Saido Berahino hares after it and tumbles under the challenge of onrushing goalkeeper Heurelho Gomes. The referee says no penalty, and on second viewing it looks a good decision.
Watford picking up where they left off. Odion Ighalo can certainly strike a ball from distance and he once again tests Boaz Myhill with an accurate long-range missile.
Jose Jurado might be on the team sheet as a central midfielder, but his first-half heat map shows how effectively he drifted into wide areas to cause West Brom problems.
West Brom have a free kick in a threatening area, but Darren Fletcher isn't on the same wavelength as his team-mates and his quickly taken set-piece drifts behind for a goal-kick. Waste.
Back under way at Vicarage Road...
West Brom's record signing Salomon Rondon is warming up at half time, enjoying a delightful misting from the pitchside sprinklers. Missing the tropical rainstorms of his native Venezuela perhaps?
Just the 11 on show so far today!
How do you feel about that half then Watford fans? If I were you, I'd be hugely encouraged by the general play of the Hornets - they had West Brom on the back foot for virtually the entire first half with slick, powerful attacking football.
But as we all know, promoted teams need to take advantage of periods of dominance, especially at home, if they want to beat the drop, and Watford didn't manage to do that in the first half.
Match of the Day commentator
"Watford weren't involved in a goalless draw last season, but it's 0-0 here at the break. They weren't able to take any of the chances that they created. Tony Pulis will be looking for a big improvement from his side in the second half.
The referee brings the first period to a close. Watford have played terrifically well, but they haven't yet manage to take any of their chances. Will they be made to rue that in the second half?
And again Watford go close! The Deeney-Ighalo combination that tormented the Championship last season nearly unlocks a Premiership defence for the first time, with the Nigerian bursting on to the Englishman's knock-down header and firing in a stinging shot which is well tipped over by Boaz Myhill.
Watford are winning the battle of midfield muscle at the moment: Etienne Capoue never made much impact at Spurs but he's giving West Brom the runaround, shrugging off the challenge of James Morrison in the middle of the park.
West Brom are like a struggling prizefighter at the moment - every time they try to attack, they invite Watford on to them on the counter. This time it's Ikechi Anya leading the breakout, but for all their pressure, Watford can't quite find that cutting edge.
Allan Nyom looks a really good signing for Watford. He can use his power to really good effect in both defence and attack. He wins a corner off James Morrison, but it's well cleared.
And Jurado curls the free kick a whisker wide! Watford have had all the chances so far.
Jonas Olsson goes into the book for a cynical trip on the rampaging Odion Ighalo.
West Brom coming in to the game now. This time Craig Cathcart has to clear awkwardly behind from Chris Brunt's dangerous cross. But the corner is cleared easily at the near post and Watford surge upfield on the counter, led by Allan Nyom, who advances on the area and stings the gloves of Boaz Myhill with a powerful shot.