Michail Antonio scored his second winner in four days as his stunner lifted West Ham up to seventh with a 2-1 victory over West Brom
 The lowly Baggies picked up their first win under Sam Allardyce at the weekend and again impressed at the London Stadium, but in the final seconds of a steadfast first half found themselves behind when Jarrod Bowen chested in Vladimir Coufal's cross
West Ham's return to form has been somewhat longer-term but their 100 per cent start to 2021 looked in jeopardy when Matheus Pereira was allowed to travel to the edge of the box before firing past Lukasz Fabianski five minutes after the restart
The visitors' hopes of moving within two points of escaping the relegation zone was shortlived, though, with Antonio firing in a superb winner on the turn from Andriy Yarmolenko's header, to lift the Hammers above Chelsea - who visit Leicester later on Tuesday - and into seventh
Some early fouls and high-intensity pressing from Sam Allardyce's visitors suggested they had not come to simply sit back and soak up pressure at the London Stadium, and instead Pereira should have tested Fabianski from the first real chance of the game, but turned Callum Robinson's lay-off well over
The Hammers found life difficult in the final third with West Brom still managing to pack the box when they did find a dangerous position, but should have seen Craig Dawson score his first league goal for the club when he fired wide when unmarked at a corner
As the half wore in it slowly developed into a case of attack against defence with the Baggies holding firm - but from the last of 10 open-play crosses from the hosts, they finally found a breakthrough, when Coufal returned Aaron Cresswell's ball across the six-yard box, where Bowen nonchalantly chested in with seconds of the opening period remaining
The Baggies re-emerged a more attacking outfit again for the second period with Pereira, who had been unusually quiet before the break, showing his quality to score his fourth goal in three games
With Conor Gallagher ahead of him keeping the West Ham defence in two minds, he strode to the edge of the home box before aiming a powerful effort low inside the far post to beat Fabianski
For a few minutes, the Hammers struggled to regain their composure with West Brom feeling the confidence of their leveller, but without another chance to really test Fabianski their moment soon came and went
First Manuel Lanzini's effort, cleared off the line by Dara O'Shea, re-asserted the hosts' dominance, before Declan Rice's effort squirmed across the goal-line and away to safety - but a real moment of quality from Antonio, for the second time in as many games, would again prove the winner
David Moyes had said in the build-up the best was yet to come from his forward, and the 30-year-old showed exactly what the manager meant as he turned on a sixpence to turn Yarmolenko's header, directed behind him, goalwards and into the bottom corner
In the final minute, substitute Darnell Furlong was given a chance he had to score, with points at such a premium for the relegation-threatened visitors, but he steered his effort wide of the near post - and allowed West Ham to move seventh, after a fourth straight win they were made to work hard to achieve
West Ham manager told : "It wasn't our best performance but it keeps a small run going
 We're showing a bit of growth at the whole club, in how we play and what we do, we'd have liked to have played better tonight but I'm not disappointed when we've taken the three points
"I'd like to dream a lot, but we're humble and understand we're not going to start shouting about things too soon
 History has shown we're not always able to back that up; I want to be the one who can back that up and who does make things look better
"This isn't where I want to be, we want to be competing at the top end
"West Brom boss :"I think it's a great effort from the players, but there's those lapse in concentration moments at the back where we've conceded two goals we could have avoided
"One was less than 10 seconds left before the end of the first half, a bit more concentration on dealing with the clearance at the beginning, and then a ball back in the box, we had enough bodies to deal with it but it was a goal
"It was a really great response, we started playing and passing the ball a lot better than in the first half, got the goal, but then you have to expect when you're playing a team at home they're going to put pressure on you - and we, unfortunately, faltered again
"West Ham have spent some big money on big-name players in recent years
 But who remains their most important attacking asset? A £7m winger-turned-striker from Nottingham Forest
Again, Antonio showed what an asset he is to the Hammers; he has won them four points alone with his goals this week, but his performance against West Brom had so much more to it
 Strength, pace, technical ability
He is the kind of striker few manage to be at this level against Premier League backlines
 He should have had an assist for a Lanzini chance at 1-1 but he made sure he got his goal
 When he's fit, he's a match for any defence in the league
West Ham host Sky Bet League One side Doncaster in the fourth round of the FA Cup on Saturday; kick-off at 3pm
West Brom, already eliminated from the competition, are back in action next Tuesday when Manchester City visit The Hawthorns; kick-off at 8
15pm
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