Welcome to LIVE coverage of the FA Cup fourth round match between Arsenal and Aston Villa from the Emirates Stadium!

There's the final whistle! An amazing turnaround and Arsenal, aided by a Villa capitulation, are into the fifth round where they will face Middlesbrough or Sunderland.

Barry Bannan launches a high, swirling cross into the box, but Fabianski makes an unchallenged catch.

Chance for Henry as he dribbles into the box, but he tries to cut back inside his man and loses possession.

Arsenal doing a great job of milking the clock, protecting the ball inside the Villa half.

I can't see more than three minutes of injury time - of course, it's four!

Villa hit a quick free-kick towards the Arsenal box, but it's completely wasted.

Villa will be praying for stoppage time, but there hasn't been much. I can't see any more than three minutes.

Arsenal change: Thierry Henry comes on for Theo Walcott. And Bacary Sagna is back from injury! He comes on for Alex Oxlade-Chamberlain.

Clark upends Ramsey and that's a free-kick to Arsenal.

Arsenal work a corner short as they try to run down the clock.

Thierry Henry is preparing to come on...

Oxlade-Chamberlain takes a low shot, but Hutton blocks. Arsenal looking to kill this off.

Villa free-kick 35 yards out... Bannan to launch it into the Arsenal box... but Fabianski makes a good catch!

Offside flag up against Robbie Keane - in fact he was onside, but the linesman thought he was off.

Villa substitution: Barry Bannan comes on for Stiliyan Petrov.

Villa are looking increasingly threatening, and wouldn't it be typical Arsenal to do the hard work then concede a late goal?

Chance for Robbie Keane as the corner is headed down, but Van Persie gets a vital touch as Keane wants to pull the trigger!

Yellow card Laurent Koscielny for pulling back Bent.

Chance for Villa as Gardner meets Ireland's corner but Fabianski is equal to it!

Clark's cross is blocked behind by Coquelin and that's a corner...