The final whistle goes. A great night for United, who could have hit six or seven in the end. For West Brom they need to put this game behind them and prepare for the clash with Hull on Saturday.
90
Robert Koren fires the free kick over the bar.
90
Yellow Card
Michael Carrick also sees yellow for a foul on the edge of the area. Two minutes will be added on.
90
Yellow Card
James Morrison is shown a yellow card.
88
United's attackers are toying with West Broms defenders but they fail to get a shot on in goal. The final whistle can't come quick enough now for West Brom.
86
Carlos Tevez gets free in the area and tries to take it round Carson, but the England man does well and makes the save.
83
Another great move by United sets up Ronaldo but he shoots wide.
80
The only issue in this game now is whether United can keep that record-equalling clean sheet. They continue to defned well, depsite being 5-0 up.
75
Substitution
Zoran Tosic comes on for Dimitar Berbatov to make his Premier league debut.
73
Goal
United are rampant, Berbatov breaks free and lays it off for RONALDO to score his second of the game. It was all too easy for United.
68
Substitution
Youngster Richard Eckersley also comes on in place of Gary Neville.
68
Substitution
With the game effecitvely over Alex Ferguson brings off Rio Ferdinand for Wes Brown .
68
United continue to pour forward. Carrick has a chance to make it five but he drags his shot wide.
65
Goal
It's becoming a nightmare evening for The Baggies. United cut through their defence again and Giggs lays it off for RONALDO to tap home.
63
Substitution
James Morrison comes on for Gianni Zuiverloon.
62
Substitution
Roman Bednar comes on for the tiring Jay Simpson, the young stirker can be pleased with his performance tonight though.
60
Goal
Giggs swings the corner in and VIDIC arrives completely unmarked to head past Carson. Game over now.
55
Great chance for West Brom, Brunt plays in Ryan Donk but his shot rebounds off the post, unlucky that.
52
Berbatov has the ball in the net again but the flag is up, the Bulgarian had strayed a yard offside.
50
Brunt's effort goes just over the bar, encouraging start to the half by West Brom.
49
Decent start to the half by West Brom. A decent passing move ends in Chris Brunt being brought down 25 yards out. Free kick in a dangerous position.
Second half
We are underway again at the Hawthorns.
45
Substitution
Marek Cech has come on for Marc-Antoine Fortune as West Brom somehow look to get back into the game.
Half time
The half time whistle goes and boos echo round the Hawthorns. The home fans are understandably unhappy at Rob Styles' decision to send off Robinson, but Carson's howler has made their job even more difficult in the second half.
44
Goal
Nightmare for West Brom, Scott Carson drops an easy cross allowing TEVEZ to nip in and score, another goalkeeping howler from Carson.
40
Yellow Card
Robert Koren is booked for dissent, West Brom aren't happy.
39
Red Card
It's gone from bad to worse for West Brom. ROBINSON slides in on Park and appears to get the ball but Rob Styles shows a red card, which was rescinded on appeal.
38
Berbatov is back on. Meanwhile a good ball in from Borja Valero falls to Gianni Zuiverloon but he miscues his half-volley and it goes over.
36
Injury scare for United as Berbatov hobbles to the touchline holding his hip, it's not yet clear whether he can continue. United briefly down to ten men while Berbatov recieves treatment.
33
Great chance for United, Giggs plays in through to Ronaldo who chips it past Carson but it misses the target, bad miss by the world player of the year.
29
Gary Neville collects a pass in the area and goes down, ref Styles says no penalty. It looked a decent shout though, another let off for West Brom.
27
West Brom seem to have recovered from going a goal down but are struggling to create chances, Robert Koren tries a shot but it is well blocked by Nemanja Vidic.
24
West Brom have to be careful as United nearly make it two, Ryan Giggs goes on a mazy run and plays it to Ronaldo who then sets up Carlos Tevez who shoots just wide.
22
Goal
BERBATOV plays a neat one-two with Carrick before calmly slotting past Carson, great goal by United.
16
West Brom's front two are causing United's defenders all sorts of problems. Fortune breaks free again before Ferdinand takes him down, but much to the home fans dismayref Styles says no free kick.
14
Simpson again does well down the flanks but with team-mates in the box his low cross can only find Michael Carrick who clears.
10
West Brom go immediately up to the other end and Fortune goes down in the area, but referee Styles waves away the penalty appeals.
9
Two West Brom defenders collide and Berbatov gets through on goal but Carson saves his shot, let off that for The Baggies.
7
It's United's turn to attack now as Park fires in an effort straight at Carson after Ronaldo miscued his shot.
6
Jay Simpson bursts through the United defence but his shot is well blocked by Gary Neville, good play all round. Its a lively opening here.
4
Marc-Antoine Fortune has a shot deflected behind for a corner which United eventually clear after a defensive scramble.
2
Ji-Sung Park cuts on from the right and sets up Dimitar Berbatov who shoots tamely at keeper Scott Carson.
Kickoff
Referee Rob Styles finally gets us underway here at The Hawthorns.
Awaiting Kickoff
Due to problems on the motorways around the Midlands kick off at the Hawthorns has been delayed by 30 mins. We will now get under away at 20:15 GMT.
Awaiting Kickoff
Manchester United welcome back Rio Ferdinand, Ryan Giggs and Ji-Sung Park to their starting 11. Ronaldo has shaken off the affects of a stomach bug and keeps his place. Its Berbatov and Tevez up front.
Awaiting Kickoff
Jonathan Greening is West Broms most notable absentee - he's out for 6 weeks with a medial ligament problem, Borja Valero comes in. Paul Robinson is captain in Greenings absence while Ryan Donk starts despite suffering a groin strain at the weekend.
West Bromwich Albion
Manchester United
Full time
The final whistle goes. A great night for United, who could have hit six or seven in the end. For West Brom they need to put this game behind them and prepare for the clash with Hull on Saturday.
Robert Koren fires the free kick over the bar.
Yellow Card
Michael Carrick also sees yellow for a foul on the edge of the area. Two minutes will be added on.
Yellow Card
James Morrison is shown a yellow card.
United's attackers are toying with West Broms defenders but they fail to get a shot on in goal. The final whistle can't come quick enough now for West Brom.
Carlos Tevez gets free in the area and tries to take it round Carson, but the England man does well and makes the save.
Another great move by United sets up Ronaldo but he shoots wide.
The only issue in this game now is whether United can keep that record-equalling clean sheet. They continue to defned well, depsite being 5-0 up.
Substitution
Zoran Tosic comes on for Dimitar Berbatov to make his Premier league debut.
Goal
United are rampant, Berbatov breaks free and lays it off for RONALDO to score his second of the game. It was all too easy for United.
Substitution
Youngster Richard Eckersley also comes on in place of Gary Neville.
Substitution
With the game effecitvely over Alex Ferguson brings off Rio Ferdinand for Wes Brown .
United continue to pour forward. Carrick has a chance to make it five but he drags his shot wide.
Goal
It's becoming a nightmare evening for The Baggies. United cut through their defence again and Giggs lays it off for RONALDO to tap home.
Substitution
James Morrison comes on for Gianni Zuiverloon.
Substitution
Roman Bednar comes on for the tiring Jay Simpson, the young stirker can be pleased with his performance tonight though.
Goal
Giggs swings the corner in and VIDIC arrives completely unmarked to head past Carson. Game over now.
Great chance for West Brom, Brunt plays in Ryan Donk but his shot rebounds off the post, unlucky that.
Berbatov has the ball in the net again but the flag is up, the Bulgarian had strayed a yard offside.
Brunt's effort goes just over the bar, encouraging start to the half by West Brom.
Decent start to the half by West Brom. A decent passing move ends in Chris Brunt being brought down 25 yards out. Free kick in a dangerous position.
Second half
We are underway again at the Hawthorns.
Substitution
Marek Cech has come on for Marc-Antoine Fortune as West Brom somehow look to get back into the game.
Half time
The half time whistle goes and boos echo round the Hawthorns. The home fans are understandably unhappy at Rob Styles' decision to send off Robinson, but Carson's howler has made their job even more difficult in the second half.
Goal
Nightmare for West Brom, Scott Carson drops an easy cross allowing TEVEZ to nip in and score, another goalkeeping howler from Carson.
Yellow Card
Robert Koren is booked for dissent, West Brom aren't happy.
Red Card
It's gone from bad to worse for West Brom. ROBINSON slides in on Park and appears to get the ball but Rob Styles shows a red card, which was rescinded on appeal.
Berbatov is back on. Meanwhile a good ball in from Borja Valero falls to Gianni Zuiverloon but he miscues his half-volley and it goes over.
Injury scare for United as Berbatov hobbles to the touchline holding his hip, it's not yet clear whether he can continue. United briefly down to ten men while Berbatov recieves treatment.
Great chance for United, Giggs plays in through to Ronaldo who chips it past Carson but it misses the target, bad miss by the world player of the year.
Gary Neville collects a pass in the area and goes down, ref Styles says no penalty. It looked a decent shout though, another let off for West Brom.
West Brom seem to have recovered from going a goal down but are struggling to create chances, Robert Koren tries a shot but it is well blocked by Nemanja Vidic.
West Brom have to be careful as United nearly make it two, Ryan Giggs goes on a mazy run and plays it to Ronaldo who then sets up Carlos Tevez who shoots just wide.
Goal
BERBATOV plays a neat one-two with Carrick before calmly slotting past Carson, great goal by United.
West Brom's front two are causing United's defenders all sorts of problems. Fortune breaks free again before Ferdinand takes him down, but much to the home fans dismayref Styles says no free kick.
Simpson again does well down the flanks but with team-mates in the box his low cross can only find Michael Carrick who clears.
West Brom go immediately up to the other end and Fortune goes down in the area, but referee Styles waves away the penalty appeals.
Two West Brom defenders collide and Berbatov gets through on goal but Carson saves his shot, let off that for The Baggies.
It's United's turn to attack now as Park fires in an effort straight at Carson after Ronaldo miscued his shot.
Jay Simpson bursts through the United defence but his shot is well blocked by Gary Neville, good play all round. Its a lively opening here.
Marc-Antoine Fortune has a shot deflected behind for a corner which United eventually clear after a defensive scramble.
Ji-Sung Park cuts on from the right and sets up Dimitar Berbatov who shoots tamely at keeper Scott Carson.
Kickoff
Referee Rob Styles finally gets us underway here at The Hawthorns.
Awaiting Kickoff
Due to problems on the motorways around the Midlands kick off at the Hawthorns has been delayed by 30 mins. We will now get under away at 20:15 GMT.
Awaiting Kickoff
Manchester United welcome back Rio Ferdinand, Ryan Giggs and Ji-Sung Park to their starting 11. Ronaldo has shaken off the affects of a stomach bug and keeps his place. Its Berbatov and Tevez up front.
Awaiting Kickoff
Jonathan Greening is West Broms most notable absentee - he's out for 6 weeks with a medial ligament problem, Borja Valero comes in. Paul Robinson is captain in Greenings absence while Ryan Donk starts despite suffering a groin strain at the weekend.