The final whistle goes and Manchester United have run out convincing 4-1 winners at Swansea to get their title defence off to a perfect start and give David Moyes victory in his first Premier League game in charge.
GOAL! Welbeck adds a sumptuous fourth for Man Utd as he exquisitely chips Vorm from inside the area after being released by a clever pass from Rooney.
Man Utd appear happy for the clock to tick down as they take their time over a free-kick in midfield and then just casually pass it around at the back.
There will be no opening-day hat-trick for Van Persie but he gets a deserved round of applause from the fans as he goes off to be replaced by Anderson for the closing stages.
The crowd seem to believe an unlikely comeback is possible and are roaring Swansea forward, but Bony concedes a free-kick for a foul to relieve the pressure.
GOAL! Bony makes amends for his miss just a minute earlier with a composed finish into the bottom corner from 12 yards after great play by Hernandez, who had won possession just outside the area and then shown the composure to play in his team-mate.
Swansea have perhaps their best chance of the whole game as an unmarked Bony is picked out by Michu's cross, but he heads wide.
Evra is flagged offside following good link-up play with Van Persie as Man Utd go in search of a fourth goal.
Swansea will keep fighting until the end and Davies sends over another decent cross, but United have defended well all game and again deal with the threat.
Canas makes way for Ki as Laudrup makes his third and final change of the afternoon.
Swansea have certainly not been outplayed in general terms here but there has been a gulf in the class of the finishing and it is Van Persie's brilliance which separates the sides.
GOAL! Robin van Persie makes it 3-0 to Manchester United with another stunning strike. Picking up possession 30 yards from goal, he steps away from a couple of defenders before unleashing an unstoppable piledriver into the top corner from just outside the area. Fantastic goal.
Rangel is really showing a willingness to get forward and has another shot at goal with a volley from inside the area after good work by Hernandez. It is a well-struck effort but fizzes wide of the far post.
Evra comes close to extending Man Utd's lead with a header from a corner which beats Vorm but is cleared off the line by Canas.
Rangel tries his luck with a volley from distance that is sliced way off target. Swansea are looking slightly devoid of ideas at present.
Man Utd launch a dangerous break but Rooney shows signs of rust as he fails to hold his run and is caught offside as the ball is played through for him by Welbeck.
Man Utd win a free-kick inside the Swansea half but it is a poor delivery from Cleverley and sails straight out of play.
Swansea are struggling to create clear openings but they are applying some serious pressure at the moment and that is why Moyes may have turned to Rooney, to provide United with another attacking outlet.
There have been times this summer where it looked like Rooney might never play for Manchester United again, but he is on now for the final half hour in place of Giggs.
Van Persie has an opportunity from nowhere to surge into the box as Swansea's defenders leave him in oceans of space, but he surprisingly spurns the chance by slicing an effort wide with the outside of his boot.
Rangel continues a good run forward but is not able to receive Shelvey's pass as Vidic's strength sees him off at the back post.
Dyer wastes a good position for Swansea as he floats a ball out of play from the corner of the area. It is hard to know if he was attempting a cross or shot.
Davies whips in a menacing cross from the left wing but Swansea's strikers do not show the desire to get on the end of it and De Gea comfortably plucks the ball out of the air.
De Gea momentarily stays down after clattering into Michu and the physio has to come on to administer treatment, but it looks as though he will be fine to carry on.
Bony does well to cushion a header into the path of Michu and De Gea has to rush quickly off his line to deny his fellow Spaniard.
Canas lets fly with an ambitious strike from 30 yards which is smashed high into the stands. Man Utd won't mind Swansea's players shooting from there.
Swansea are building up a head of steam as Michu starts to pick up possession in dangerous areas, but on this occasion the ball towards him from Rangel is intercepted by Carrick and it goes out for a corner.
Swansea have started the second half on the front foot and De Gea is called into action to make a sprawling save to his left from Michu's long-range effort.
Hernandez picks out Michu with a clever pass but he is unable to control the ball and United can clear their lines.
Bony's introduction should ensure that Swansea pose more of a physical challenge to Man Utd and he will give Michu support up front.
The second half gets started and Swansea have made a couple of changes, with Bony and Hernandez coming on for Britton and Routledge.
Fancy Swansea for a comeback - it's 18/1 for the game to end in a 2-2 draw. If you think United will stay firmly in the driving seat we offer 14/1 for a 4-0 opening day success for David Moyes' men.
The half-time whistle goes and Man Utd are on course to start their title defence with victory after taking a 2-0 lead. Van Persie's spectacular finish broke the deadlock and Welbeck added a second to leave Moyes' men in a good position at half-time.
Swansea are unable to make the most of the set-piece as Jones shows good command of the area with a strong header out.
Cleverley is booked following a challenge on Rangel which presents Swansea with a free-kick in a decent area out wide.
Swansea look a bit rattled after that two-goal blitz and it is United who are now bossing possession and making the home side chase shadows.
Carrick is shown a yellow card following a late challenge on Routledge in midfield, but the greasy conditions no doubt played a part and he can probably consider himself unlucky.
As quick as a flash, Man Utd have taken control of this match and it is a long road back now for Swansea, but there have been enough positive signs for Laudrup's side to suggest they could still get something from this game.
GOAL! Danny Welbeck makes it 2-0 to Man Utd. Van Persie draws a couple of defenders to him in the box and flicks a cross on to Valencia at the back post, who is able to send the ball in for Welbeck to finish from close range.
GOAL! Robin van Persie fires Manchester United into a 1-0 lead. The Dutchman shows his class yet again by controlling a hopeful ball into the box on his chest ahead of Chico and then reacting quickly to get in front of Williams and fire a shot past Vorm. He had to adjust his body and get his foot up high, but still managed to control his volley and direct it into the top corner with typically faultless technique.
Vidic tries to shepherd the ball back to De Gea but the goalkeeper only just gets there in the nick of time before the tenacious Dyer.
Swansea win a free-kick in a threatening position 25 yards from goal and Shelvey delivers a decent cross which just evades Williams and flies away to safety for Man Utd.
Swansea remain patient when they have the ball and bide their time waiting for the right opportunity to shoot, as Britton sees a shot from the edge of the area blocked.
Man Utd have managed to quieten the crowd slightly and will be looking to pin Swansea further back as we approach half-time.
The game just gets bogged down briefly in a congested midfield as the sides vie for supremacy and look to close down their opponents at the earliest opportunity.
Michu is causing real problems for Man Utd and he rises highest in the area again to head a corner narrowly wide of De Gea's right-hand post.
Routledge's cross from the right is just over the head of Michu but the Swansea striker shows great determination to win back the ball and United's players appear to stop in anticipation of a foul being given in their favour, before Michu flicks in a shot from a tight angle which is well kept out by De Gea.
It has been an open and exciting start to the match with chances at both ends and it would be a surprise if it remains goalless for too much longer.
Routledge does well to get away from Ferdinand and get in a low shot from 18 yards which De Gea can only push out to Dyer. There is a scramble and Michu eventually prods the ball into the net, but the flag had long since been raised for offside following Routledge's initial strike.
This is a much better spell for Man Utd now as they carve out another good chance with some slick passing, but Vorm parries Welbeck's shot from 15 yards and Giggs can only drag his shot on the rebound wide of the far post.
Giggs has an opportunity to burst through on goal after being played through the centre, but Rangel covers back quickly and makes the interception as the Welshman for once maybe makes a wrong decision and opts to try and pass rather than going on himself.
Man utd have been second best so far but Van Persie will always be a huge threat and he makes a yard of space for himself in the area to win a header, but it is directed straight at Vorm.
Dyer links up nicely with Rangel down the Swansea right before sending in a cross which is too close to De Gea and allows the keeper to collect the ball safely.
Chico slides in on Welbeck with a diving tackle near the touchline which prompts applause from the Swansea faithful.
These are really slippery conditions the players are faced with at the Liberty Stadium following a deluge of rain and great care will have to be taken with every challenge.
Valencia becomes the second player to be booked inside the opening ten minutes as he is cautioned following a late challenge on Canas.
Jones has admitted he would like to score more goals this season and he comes close to a spectacular opener with a well-hit volley from the corner of the area which forces Vorm into an acrobatic save.
Swansea are showing a lot of urgency in the early stages and Jones is pressured into passing back to De Gea by Routledge. Michu then continues the good work by closing down the goalkeeper, but the ball ricochets out of play for a goal-kick.
Shelvey does well to create space for himself down the Swansea right and deliver a teasing cross into the centre, which United clear behind for a corner.
Canas is the one sent tumbling on this occasion following a tackle by Welbeck but referee Phil Dowd waves play on and it looks a good decision as the visiting striker just got a touch on the ball.
Canas is shown an early yellow card following a mistimed challenge on Cleverley which sent the Manchester United midfielder's feet from under him in the centre of the pitch.
Swansea are sure to enjoy a lot of possession as they always tend to do and they get off to a solid start with a good spell of passing in midfield.
Swansea get the game started on a day which marks the beginning of a new era for Manchester United as they set out for the first time on a Premier League campaign with a manager other than Ferguson at the helm.
Jamie Warrior says: Toughest start I've ever seen for united including this game. "Many say it will be easy but I can see us struggling. But I've got my fingers and toes crossed that we can just nick a 3-2 win. We looked comfortable against Wigan in the shield but this is a tougher challenge. Van Persie with 2 goals either side of half-time with Danny Welbeck scoring also, Michu and Pablo to set up a frantic finale.... Please, let it be a winning start."
Ben from Sutton writes: "Disappointed to hear that Rooney is on the bench. Would have been a good chance for moyes to show Rooney that his intention is to start Rooney and play him whenever he's fit and available. We can not let him go and maybe a start on the first game of the season might of convinced him to stay. Close game today and a narrow 2-1 victory for the reds, RVP to get on the score sheet."
Swansea (13/5) have been well backed to upset the champions, prompting Manchester United's odds to drift out from 4/6 to 11/10 ahead of kick-off. Robin van Persie heads the goalscorer markets and is available at 9/2, enhanced from 7/2, to score first in our Price Boosts.
Shafi from Tunbridge Wells says: "I doubt Man Utd are gonna win today as no Kagawa or Rooney in starting line-up. I don't know why Welback is in the first 11."
The team news regarding Rooney is that he has been named among the substitutes for Manchester United, with Danny Welbeck starting alongside Robin van Persie. For Swansea, Jonjo Shelvey and Jose Canas have been handed debuts but Bony and Pablo Hernandez are on the bench and it looks like Michu will start as a lone frontman.
Alex writes: "I think if United play well then they will win. Moyes should play Rooney! I'm saying 2-1 to United with RVP and Kagawa grabbing the goals!!!.....Come on United!"
Ben Gleeson in Cardiff says: "None of us know exactly what has gone on behind the scenes, but I personally do NOT want Rooney anywhere near the starting 11. I think Kagawa is far more effective playing as the man in the hole and would really like to see Moyes promote him to a first team regular. The game will be tough, and I can see United having to come from behind to win with goals from RVP and Zaha."
Swansea: Vorm, Rangel, Flores, Williams, Davies, Britton, Canas, Shelvey, Dyer, Routledge, Michu. Subs: Tremmel, Amat, Taylor, Ki, Pozuelo, Hernandez, Bony.
Manchester United: De Gea, Evra, Jones, Ferdinand, Vidic, Giggs, Carrick, Cleverley, Valencia, Welbeck, Van Persie. Subs: Lindegaard, Fabio, Smalling, Anderson, Zaha, Kagawa, Rooney.
Swansea's summer has been much more settled, after some early rumours about a possible departure for manager Laudrup subsided. Unlike United, they have made a number of eye-catching signings, including the arrival of Wilfried Bony in a club-record deal, and his partnership up front with Michu promises to be one to savour for Premier League audiences.
It has been a long summer of transfer speculation and Wayne Rooney has provided one of the most protracted sagas, after Ferguson revealed on the final day of last season that the striker had submitted a transfer request. Chelsea have failed with a couple of bids to sign Rooney and United insist he is not for sale, but an injury in pre-season did little to cool the rumours as it limited his involvement. Rooney did feature for England in midweek and has travelled with the rest of the United squad to Wales.
Mark in London writes: "Man Utd look dodgy at the moment, Swansea look good. I support Man Utd but I'm not at all confident. Honest prediction, Swansea to win 2-1."
The first obstacle facing United is another potential stumbling block, with Swansea looking to build on a successful first season under Michael Laudrup. The Welsh club made history with victory in the Capital One Cup last term and have already begun their Europa League adventure with a comfortable win over Malmo. Swansea have gained many admirers for their style of football but there is also substance there and they will be confident of improving on a ninth-placed finish.
United ran away with the title last season in what turned out to be their final campaign under Ferguson, finishing 11 points clear of nearest rivals Manchester City, but there is a general consensus that the next 12 months will be much tighter following managerial changes for the top three clubs. Moyes has already clinched his first trophy since making the move from Everton after a win over Wigan Athletic in last weekend's Community Shield, but the real test begins now and he could not have been given a much harder start with games against Chelsea, Liverpool and Man City to come in their opening five fixtures.
James Connolly is the first to get in touch, saying: "For me Wayne Rooney has to start today. It might calm some of the speculation surrounding him which would be great but if not hopefully Kagawa and RVP play together - look a good combination. I can see us nicking a 0-1 win."
Let us know your views on today's game by getting in touch with your views and predictions at Lewis.Rutledge@bskyb.com, or via Twitter @SkySportsLewis. What type of game are you expecting today? Can Swansea spoil Moyes' big day or will United prove too strong? The full team news will be in shortly but who do you think are likely to be the key players?
Welcome to our minute-by-minute commentary of Swansea's Premier League clash against Manchester United at the Liberty Stadium, as the reigning champions begin their title defence with a tough away game. David Moyes faces the challenge of following in the footsteps of the legendary Sir Alex Ferguson and will be desperate to make a winning start in his first league game in charge of United.