90 Park is caught offside following a pass from Carrick.
89 Cambiasso attacks the ball in United's box but he cannot quite connect with the header.
87 Ole! Ole! Ole! Shout the Old Trafford crowd as United keep the ball at their leisure.
86 Ibrahimovic scuffs his pass and that prompts jeers from the crowd. He's been more miss than hit tonight.
85 Cesar does well to keep out a powerful, swerving free-kick from Ronaldo.
84 Ji-Sung Park replaces Rooney.
82 Figo gets the better of Anderson but is penalised for a foul on the Manchester United midfielder.
81 Muntari is caught offside and he gives the linesman a bewildered look. He was off, by about half a yard.
79 Vidic is forced to deal with Ibrahimovic after the Swedish striker controlled a long ball well. Vidic wins the battle.
78 Samuel and Vidic scrap for the ball in the area but this time it evades United's centre-back.
77 Giggs' shot deflects off Zanetti and loops over Inter's bar for a corner.
76 Muntari is late on Ronaldo and he receives a yellow card.
74 The ball falls to Anderson who hits a tame shot wide from 20 yards.
73 Muntari whips in a great cross but Ibrahimovic bundles the ball wide when a clean header would surely have resulted in a goal.
72 Cambiasso volleys a ball out wide to Figo, who slips before crossing too close to van der Sar.
71 Rooney is now booked for a late challenge. van der Sar punches the resulting free-kick clear.
70 Balotelli is replaced by Figo as Jose Mourinho makes another change. United bring on Anderson for Scholes.
69 van der Sar is alert and catches Balotelli's free-kick.
68 Rooney is penalised for wrestling Maicon to the ground.
66 Adriano does an Ibrahimovic, and his effort is even wilder.
65 Desperate stuff from Inter as Ibrahimovic blasts a shot high and wide from 30 yards.
64 Balotelli's corner is headed away by O'Shea. United break but Scholes' shot is blocked. It's an open game now.
63 Rooney tests Cesar with a powerful drive from 25 yards.
61 Rooney is back helping his defence as Inter throw caution to the wind.
60 Berbatov with a chance at the other end but he is denied by Cesar from close range.
59 Adriano hits the post within a minute of coming on! Great football from Inter, with Cambiasso picking out the substitute with a lobbed pass.
58 Stankovic is replaced by Adriano as Inter go for goals.
56 Cambiasso plays a sharp pass into Ibrahimovic who can only cross into the arms of van der Sar.
55 Inter keep the ball in midfield but they aren't really probing the United rearguard.
53 Ronaldo can only find the wall from the free-kick.
52 Samuel goes in hard on Ronaldo and that is a caution. Chance for United over 30 yards from goal.
51 Ronaldo falls to the ground after brushing with Balotelli, who is furious with the United player for going down too easily.
50 Great timing from United there as Inter looked right up for the challenge before Ronaldo scored. There task looks a really difficult one now.
49 GOAL! RONALDO! A brilliant goal from United. Giggs takes on the Inter defence and drifts across from right to left, passing to Rooney on the edge of the box. The England striker chips a deft cross right onto the head of Ronaldo who buries his chance. 2-0.
48 Inter have started strongly and are pressing for the equaliser.
47 Balotelli's powerful effort from 25 yards goes wide of van der Sar's left-hand post.
46 The second half is under way at Old Trafford.
Want to know where the money's been going in-running? Well I have the answers. The man who pushes the buttons at Sky Bet says: "Inter have come on strong after falling behind early on and all the money towards the end of the first half was for them. Jose Mourinho's side have been strongly supported to win in 90 minutes or to qualify from the tie - at the break they can be backed at 12/1 to win the game (United are 1/5). Inter may be doing most of the attacking, but one in every four bets on the next scorer has been placed on Wayne Rooney, who starts the second half at 13/2 to strike next."
45 Just three seconds of injury time as the referee's whistle signals the break. 1-0 to Manchester United at half-time.
45 Rooney fires one wide from 25 yards.
44 Another loose pass from Scholes finds its way to Maicon who shoots into the arms of van der Sar from distance.
43 Giggs looks for the run of Evra but his pass is just too strong and the ball runs through to Cesar.
42 Giggs battles to win the ball back for United in midfield.
40 Mario Balotelli plays an excellent pass through to Ibrahimovic who drags his effort just wide of van der Sar's right-hand post.
38 The ball skips off the greasy surface into the path of Stankovic six yards out, but he cannot control his effort and United have a goal-kick.
37 O'Shea is fed in by Rooney but he cannot beat the rushing Cesar. You can't help but think if that had fallen to Giggs or Berbatov United would be 2-0 up now.
35 Stankovic with a brilliant swerving volley from 30 yards. Van der Sar gets the slightest of touches - it's a very good save - but the referee doesn't spot it and United have a goal-kick.
34 Carrick almost finds Berbatov but he is just beaten to the ball by Javier Zanetti.
33 Giggs skips through a few challenges in midfield but then just underhits a pass intended for Rooney.
32 O'Shea with a strong header as United defend another Inter free-kick.
31 Rooney slides a ball through towards Berbatov but the Bulgarian cannot control the ball under pressure from two Inter defenders.
30 Cesar comes to collect the ball at the edge of Inter's box.
28 Chance for Inter. Zlatan Ibrahimovic is free at the back post and his downward header bounces up onto the bar and behind. Glorious opportunity.
27 Giggs tries a trick but backheels the ball to no-one. United have been sloppy in the last 10 minutes.
26 Walter Samuel has space down the Inter left but he can only blast an attempted cross high into the stands.
25 Now Scholes hits a loose pass but United get away with it as Carrick is quick to halt the Inter attack.
24 Rooney is careless with his pass with O'Shea in acres of space.
23 Free-kick to United as Inter are penalised for pushing at the set-piece.
22 Vidic deals with an awkward ball in a unique way. He ends up on his back and Inter have a corner.
21 Viera gets the better of Carrick in the centre circle.
20 Rooney shoots well wide after latching onto a cross from Evra.
19 Evra makes a run into the Inter box, and the home fans roar for a handball as a grounded Dejan Stankovic can't get his arms out of the way. It's inconclusive, though, and would have been harsh anyway.
18 Ronaldo's already showboating. A lovely back-heel to John O'Shea.
16 Ryan Giggs is blocked off as he tries a one-two with Rooney. The referee doesn't award a free-kick.
15 Scholes chips a ball over to Ronaldo who cuts inside and fires in a low cross. Rooney tees up Berbatov but the Bulgarian hits a weak volley that doesn't trouble Julio Cesar.
13 Patrick Viera wins the ball in United's area but it loops into the hands of van der Sar.
12 Ivan Cordoba strides out of Inter's defence with the ball.
11 Edwin van der Sar collects the free-kick without fuss.
10 Free-kick to Inter 40 yards from United's goal. Their first chance to apply the pressure here.
9 Carrick looks for Wayne Rooney with a long pass. Direct stuff from the home side who are really getting into Inter early on here. Can the Italians weather the storm?
8 Michael Carrick now looks for Ronaldo on the right but his pass is also wayward.
7 Paul Scholes' long pass is a couple of inches too high for Cristiano Ronaldo.
6 Esteban Cambiasso spreads the play as Inter look to calm things down.
5 There was a high tempo at Anfield last night and it's being matched at Old Trafford here. Inter look shell-shocked.
4 GOAL! VIDIC! Awful marking from Inter and Nemanja Vidic is allowed a free header from the corner. It's an absolute bullet that finds its way to the corner of the net. 1-0 United, what a start.
3 An early corner for United his headed away by the Inter defence, but the home side soon have another. High tempo early on.
2 Berbatov went over on his ankle in the warm-up but it can't have been too serious as he makes a run down the inside right channel.
1 We're under way at Old Trafford.
Dimitar Berbatov had a scare in the warm-up but he's fit enough to line-up. Just seconds to kick off now.
United have been in such red-hot form lately, the 4/6 our friends at Sky Bet offer is tempting.
And here's Inter: Julio Cesar, Maicon, Cordoba, Samuel, Santon, Zanetti, Cambiasso, Vieira, Stankovic, Ibrahimovic, Balotelli. Subs: Toldo, Maxwell, Figo, Cruz, Adriano, Muntari, Rivas.
Here's the United team: Van der Sar, O'Shea, Ferdinand, Vidic, Evra, Ronaldo, Carrick, Scholes, Giggs, Rooney, Berbatov. Subs: Foster, Anderson, Park, Evans, Fletcher, Gibson, Tevez.
Welcome to our coverage of a massive Champions League clash at Old Trafford as Manchester United entertain Inter. It's 0-0 from the first leg and you can follow it live right here.