Second-half goals from Anthony Elanga, Mason Greenwood and Marcus Rashford ensured Manchester United moved to within two points of the Champions League places with a morale-boosting 3-1 win at Brentford
Ralf Rangnick's side were indebted to the brilliance of David de Gea in the first half as he twice kept out efforts from Mathias Jensen from point-blank range
But United punished Brentford's profligacy in the second period as Elanga met Fred's cross to score only his second league goal for the club (55) before Greenwood tapped home Bruno Fernandes' pass (62) for his first league goal since October
Cristiano Ronaldo looked disgruntled as he was replaced by Rashford, but Rangnick's change was vindicated as the substitute's tidy finish from another Fernandes pass put the seal on an impressive second-half showing (77)
The result means United stay in seventh place in the Premier League courtesy of earlier on Wednesday - but now level on points with Arsenal in sixth
Ivan Toney scrambled home his fifth Premier League goal of the season - and only third in open play - with five minutes remaining but Brentford remain in 14th place on 23 points, still 10 points clear of the relegation zone
Brentford head coach Thomas Frank said afterwards: "I'm unbelievably proud of my team
 We are the smallest club in the Premier League, Manchester United the biggest
 We destroyed them in the first half, they didn't have a sniff, three huge chances and there could only have been one winner of this game
 They are unbelievably lucky
 I know all the stuff about taking chances
 They changed the system against little Brentford
"United would emerge as deserved winners in the second half, but quite why they took so long to get going will provide their Champions League rivals with plenty of encouragement
 For large periods, they were unconvincing again but for Rangnick, this was welcome respite
United have now gone 13 Premier League games in London unbeaten for the first time since 2013 but they were second best throughout the opening period
 Arsenal, Chelsea and Manchester City all suffered here this season to varying degrees, and the visitors were given an early warning inside 80 seconds when Jensen blasted wide from the edge of the box
Brentford were facing United at home for the first time since 1947
 Frank called on his players to create a "magic moment" at the Brentford Community Stadium
Frank encouraged his troops to play with aggression and intensity, urged on by a boisterous home crowd, and the Bees came close to breaking the deadlock on 13 minutes when Bryan Mbeumo did well to feed the unmarked Jensen but David de Gea sprung to his left to save well with his feet
The danger had not passed during a frenzied phase of play, with Victor Lindelof making the first of two blocks in quick succession - first he denied Vitaly Janelt before Alex Telles made a vital intervention to block Mads Sorensen's shot from the resulting corner
 United were penned in, and the pressure only eased after Christian Norgaard hooked Jensen's pull-back over De Gea's crossbar
In contrast, United had plenty of possession but were ponderous with it, failing to test league debutant Jonas Lossl before Diogo Dalot's speculative drive from distance swirled just wide
 Brentford retained a threat on the counter and ought to have opened the scoring on 30 minutes
Janelt's long ball picked out Toney, who spotted the marauding run of Jensen once more off the shoulder of Lindelof but once again De Gea stood big to keep out his low shot with his left boot
The interval arrived with Brentford having failed to make any of their chances count but having ran 4
5km more than United in the first half
Rangnick appeared visibly unsettled by what he had witnessed, and while he resisted the temptation to make changes, there was a clear response from his players as Ronaldo's header from Fernandes' cross just minutes into the restart grazed the crossbar
But United were showing more signs of life and would break the deadlock from their next attack
 Fred was afforded too much time to time his cross for the onrushing Elanga, who darted in front of Mads Roerslev to control and finish with his second touch
United were now in the mood and almost scored a quickfire second when Scott McTominay's piledriver was fielded unconvincingly around the post by Lossl
 It mattered not, as Greenwood was soon providing the insurance goal
Ronaldo was instrumental as he chested the ball into the path of the onrushing Fernandes to dissect the entire Brentford defence
 His countryman galloped into acres of vacated space before timing his pass to his right perfectly for Greenwood to accept the gift
Frank sought to change things as he made three substitutions in quick succession but United duly extended their lead when McTominay sauntered through a couple of flimsy challenges to set Fernandes on his way once more, teeing up substitute Rashford for a precise finish into the roof of the net
It was Rashford's first goal since October, ending an 11-game barren run, and Rangnick immediately turned to a disconsolate Ronaldo - the man whom he replaced to explain the reasoning behind the alteration
"It's normal - he's a striker who wants to score goals," Rangnick said afterwards
 "He has to bear in mind that we have another game in three days' time
 It was 2-0, the same score we had at Villa Park and I felt we had to defend the lead this time with three at the back
"Brentford would take De Gea's clean sheet away from him in untidy fashion as Fred failed to clear Sorensen's long throw, allowing Toney to pounce with a simple finish from two yards out but it was scant consolation
"It was one of those nights, fair play to David de Gea," Frank added
 "We get those chances again one will go in the back of the net
 Our intensity killed them, we showed that in the first half
 We played the Brentford way
 It was a miracle they weren't two goals down by half-time
"He was by far the best Manchester United player today
 Their first goal changed the momentum of the game
 Of the three goals, the second is most disappointing and difficult to come back from
 The way we smashed them in the first half was fantastic
 I'm so proud of my team
""This was another valiant effort from Brentford, but ultimately they were blown away in a 22-minute spell in the second half
"Manchester United were not good in every aspect during the opening period and were second to every ball, by Rangnick's own admission, but Elanga followed up on his showing at Aston Villa to help his side rediscover their mojo
"Bruno Fernandes' influence grew in the game, and he really ought to have capped a fine individual performance with a goal to go with his two assists in stoppage time
"Tonight was the third time Fernandes has provided multiple assists in a Premier League game - since his debut in the competition in February 2020, no player has done so more in the competition
"Yet he left the pitch still ruing that miss, a sign of his standards, but this is the sort of attitude United need if they are to secure a Champions League spot - which must be the bare minimum
"Anthony Elanga speaking to : "Second half we played our best football
 We really stepped it up
"The first goal lifted the team, then the second and third goal came and it got better
"On his opener and working with interim manager Ralf Rangnick: "The first touch set it up
 I could see the 'keeper coming and I just had to head it in
"I want to continue to work hard and get more goals
 I appreciate the boss so much
 You can see the intensity we put in in training and can see that if you put in that work you get the results you deserve
"Could this be Elanga's breakout season? The Sweden under-21 star has started back-to-back Premier League games and has notched seven appearances this term, including a start on the European stage against Young Boys last month
The 19-year-old provides an abundance of pace, energy and endeavour, clocking a team-topping 19 sprints on Wednesday evening and only Scott McTominay attempted more dribbles in the opposition half
Starting as the wide-left forward in a 4-2-3-1 system, Elanga combined most frequently with Alex Telles, McTominay, Raphael Varane and Ronaldo - contributing to the majority of United's attacks coming down his flank
Brentford host Wolves in the Premier League on Saturday; kick-off 3pm
 Manchester United take on West Ham at Old Trafford at the same time
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