Last Updated: 05/02/12 2:10pm
Lacny slides in to contest a 50/50 ball with McGregor. The Rangers keeper and is team-mates are angry about the challenge
There seems to be a lack of quality out there for Rangers. Bartley gets the ball out on the right flank but he puts his cross over Pernis' bar.
The ball sits up perfectly for Rankin, the ball sits up perfectlywho volleys it but its easily saved by McGregor
Edu has an optimistic strike from distance and is way wide of the target. United will be over the moon if the continue to do that
Aluko does well to get his cross in from the left. Little meets it at the near post but scoops his shot over. Good chance.
A dispondent Jack Mollison says: All the fans knew that the current team had no class after the first game of the season. Dumped out of europe, league cup,and now the Scottish cup. We were promised an injection of money to improve things but an empty promise. Where to from here...only downhill.
An ambitious effort from Aluko sums up Rangers at the mo. Aluko balloons a shot from distance over the bar.
Kenneth misses a glorious chance. Rangers fail to clear a ball into the box but Kenneth can't get enough on his cross to get it in the corner and McGregor catches it.
Rangers prompting and probing before swinging a cross over but Pernis gets a strong punch on the cross.
We are approaching the final third of this game and Rangers appear no close to finding a breathrough in this game.
Healy peels off onto the left fank and tries to put a cross in but it's cleared for a corner. But the resulting corner is cleared for another one.
Rangers are still not really creating any chances in this half despite the fact they have cranked up the pressure
Back to action here at Ibrox. Aluko has picked up a knock to his right knee after he was caught by Mackay-Smith.
Gareth Brennan has emailed in saying: I think its been blatantly obvious to all and sundry that the Rangers squad lacked quality all round since the start of the season. Its just becoming more noticeable as they slip further behind Celtic.
Armstrong tries to find Mackay-Steven at the far post with a searching cross but it's just too long for him.
Aluko's corner is cleared and Mackay-Steven races away on the counter, only to be brought down by Davis.
The second half is on the way and Rangers boss has made one change for the start of the second half.
Do you United fans think that you will be able to see out the game? Email in to email@example.com to let me know and Rangers fans, will this result highlight the lack of quality currently in McCoist's squad? Let us know.
Can United maintain their pressing game and quality in the second half? Or will Rangers rally after a few inspirational words from Ally McCoist? Join us after the interval to find out.
Boooos ring out around Ibrox as the referee's whistle signals the interval. United have put in a performanced laced with quality in this opening 45 minutes, while Rangers have looked slightly disjointed.
Rangers almost manage to capitalise on a mix up in the United defence but they manage to clear the danger as Pernis takes a knock.
Mackay-Steven overhits a pass to Russell who was trying to spring the offisde trap and get in on goal.
Wow! Who would have envisaged this before the game. Rangers are in real danger of tumbling out of the cup here.
Great goal. A flowing move is ends with Dixon slipping the ball through to Russell who finishes with real style.
Armstrong picks up the ball in a promising area for United but he his pass forward lacks accuracy and is allowed to run through to McGregor.
Edu overhits a pass to Papac on the left flank. He does well to keep it in and get a cross in but it is easily collected by Pernis.
Healy has just forced Pernis into a great save low down to his right. Healy got the ball just inside the area and fired a low drive that was arrowing into the corner.
Bartley loses the ball as he tries to stride forward. Mackay-Steven tackles him and sets off on a counter but is stopped by Aluko.
United are pressing Rangers and not giving them an opportunity to find space or have time on the ball.
Aluko forces Pernis into a smart save at his near post. He created the chance with a fine piece of skill. Good effort.
Gunning scores a tremendous header as Rangers fail to clear the corner the ball is whipped back in for the United man who headers home.
United have defended well as rangers gain possesion but they cannot find a gap through the orange minefield.
Russell's just had a dangerous break down the right flank. It was a three on two situation. But he opted to cut and shoot when he maybe should have squared it. His effort was blocked.
Bartley gets in a timely block in the area and clears the ball as a United player struck a shot that could have caused problems
Russell tries to race through onto a through ball but McGregor clears the ball. It falls to daly who tries a dipping volley but it lacks the accuracy to beat the 'keeper
Daly collides with McGregor as he challenges for a 50/50 ball. Russell strokes the loose ball into the net but the referee blows for a foul on the Rangers 'keeper.
Dundee United: Pernis, Dixon, Kenneth, Gunning, Neilson, Robertson, Rankin, Armstrong, Mackay-Steven, Daly, Russell subs: Banks, Dillon, Flood, Ryan, Lacny
McGregor, Goian, Papac, Wallace, Bocanegra, Bartley, Edu, Davis, Aluko, Celik, Healy subs: Alexander, McCulloch, Wylde, Kerkar, Little
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My name is Soriebah, and I will be your eyes and ears at Ibrox for those of you that have not been fortunate to make it.
The atmosphere at Ibrox is expectant and passionate as always as both sides get ready for what should be an exciting Scottish Cup clash.