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Arsenal's hopes of a third successive FA Cup triumph are still alive after they overcame a brave Burnley side 2-1 in their fourth round clash at the Emirates Stadium
Calum Chambers put the Gunners ahead
with a fine finish on 19 minutes before Sam Vokes headed Burnley
level on the half hour.
But Alexis Sanchez won it for the Gunners with a close range finish after a fine flowing move early in the second half.
It promised to be a stern test for Arsene Wenger's side who were unbeaten in 13 matches in the competition going back three seasons as Championship high-flyers Burnley arrived at the Emirates unbeaten in six on the back of four successive victories.
The Gunners boss made nine changes from the side that lost at home to Chelsea in the league last Sunday, including giving a debut to new signing Mohamed Elneny, but he was still able to field a side full of quality and experience.
Alex Oxlade-Chamberlain fired just over from the edge of the box as Arsenal carved out the first chance of the tie after just three minutes.
Sanchez shot narrowly wide shortly afterwards after cutting in from the left and unleashing a low shot which flew inches wide of the upright.
At the other end, David Ospina was forced to make a point blank save to deny Andre Gray after the striker had out-muscled Laurent Koscielny deep inside the Gunners half.
Arsenal enjoyed plenty of possession early on as they looked to play their way through the Burnley defence and they were ahead on 19 minutes when Chambers finished off a fine passing move with a fine outside-of-the-foot curling finish from 15 yards.
The Gunners looked in control, but were shocked on the half hour when Vokes climbed highest to head home Tendayi Darikwa's superb cross from six yards to make it 1-1.
The home side looked to hit back immediately and Oxlade-Chamberlain volleyed wide from a difficult angle at the far post after Alex Iwobi's cross was deflected into his path, but it was 1-1 at the break.
Ospina saved from Scott Arfield immediately after the restart but the Gunners were ahead on 53 minutes when a flowing move resulted in Sanchez converting Oxlade-Chamberlain's low cross from six yards.
It was almost 3-1 moments later after a deep cross to the far post caused confusion in the Burnley defence, but Arfield was well-positioned to head the ball off the line.
Tom Heaton was forced to make a fine flying save to deny Sanchez a second goal on 70 minutes, this one from a free kick on the edge of the box, as Arsenal continued to threaten.
Tomas Rosicky was introduced for his first appearance of the season following a long lay-off through injury shortly afterwards to resounding applause from the Emirates faithful, with new boy Iwobi making way to equally loud acclaim following a fine performance.
Despite their domination, the Gunners were unable to find another goal which would surely have made the game safe and were given a stern warning when Gray fired narrowly wide as the game headed into injury time.
Elneny volleyed wide and substitute Theo Walcott was denied by a brave Heaton who dived at the England international's feet after a quick break from defence left him clean through on goal, but Arsenal had done enough to take their place in the fifth round draw.
By: Kieran O'Daly