FULL TIME: Arsenal hold on, and it's no less than they deserve, having dominated for more than 90 minutes. The Gunners are through to the fifth round and will face Portsmouth in the next round.
Booking: Goalscorer Surridge is booked for a challenge on Guendouzi.
The goal is given. There are just about three minutes remaining here and it would not be out of character for Arsenal to concede a second here...
GOAL! SURRIDGE pulls one back! There's time for an equaliser too! Francis' ball into the box evades everyone and it falls for Surridge who beats Martinez. VAR will take a look but this should stand.
Substitution: Joe Willock is replaced by Ainsley Maitland-Niles.
There will be eight minutes of added time, due to the multiple lengthy injury stoppages.
Substitution: Sam Surridge is on for Dom Solanke, who has had a poor evening.
Five minutes to play in this one and it seems to be fizzling out as if both sides realise it's pretty much over.
Chance! Gosling's long range drive takes a deflection off Xhaka and almost catches Martinez out. However, the ball flashes inches over the crossbar.
Nketiah puts Cook under pressure and the defender plays the ball straight out for a corner. Ceballos swings the ball into the box but Ake rises above Holding to clear.
There's a break in play so that Hector Bellerin can receive some treatment. It appears that he's just a bit winded following a collision.
Substitution: Double change for the hosts. Callum Wilson and Simon Francis are on in place of Harry Wilson and Jack Simpson.
Willock clips the ball towards Nketiah, who is waiting on the edge of the six-yard box. However, Ake is there to head clear for the hosts.
Substitution: Dani Ceballos is on for Nicolas Pepe.
Chance! Martinez comes off his line and gets nowhere near the corner. Simpson gets his head to the ball but it bounces agonisingly wide of the upright.
Substitution: Mustafi is stretchered off with what appears to be a nasty ankle injury, picked up after being clattered into by Martinez. Rob Holding is on to replace the German.
Ouch! Martinez comes out of his area to deal with a long ball. He gets his head to the ball but he clatters Mustafi, who stays down, in the process. It looks like he'll have to come off here. The stretcher is being prepared.
Moments before the free-kick, Guendouzi was involved in a coming together with Gosling on near touchline. The home fans called for a red card but he got away with just a warning from the referee.
A couple of Bournemouth players go to ground in the Arsenal box as they attack a free-kick, but the appeals are waved away pretty quickly. VAR briefly checks for a foul but nothing is given.
There's a break in play here to allow Martinelli to receive treatment. He was down on the grown for quite a while after getting a kick on the foot from Smith. Hopefully he'll be okay to continue.
HALF TIME: As it stands, Arsenal are on their way to the fifth round of the FA Cup. Arteta will be pleased with that first-half showing. Can Bournemouth show something different in the second half? Bournemouth 0-2 Arsenal.
Willock wins an early corner for Gunners. Pepe takes it but he hits the first man as Bournemouth get the ball clear.
Booking: Harry Wilson prevents an Arsenal counter-attack by fouling Eddie Nketiah on the break. First yellow card of the match.
SECOND HALF: We're back underway at the VItality!
There will be two minutes of added time.
Bournemouth have been a lot better in the second half of this first half, and are looking to find a goal before the break. Wilson's short corner routine comes to nothing.
Chance! Much better from Bournemouth! Gosling rises highest in the Arsenal box to meet the cross. He loops a header towards goal, but the ball drops on the roof of the net.
Save! A first taste of the action for Martinez. The ball drops to Wilson at the far post and he does really well to direct his volley on target. However, Martinez is up to the task, saving well at his near post.
Chance! Pepe twists and turns on the edge of the box before laying the ball off to Bellerin, who whips in a dangerous cross. Nketiah flings himself at the ball but Cook does well to head it clear ahead of the Arsenal striker.
Chance! Martinelli gets to the byline and he plays a low cross towards the near post in search of Nketiah. However, Ake is alert to the danger and slides in to make a crucial intervention.
The goal stands. VAR took an unreasonably long time to decide that, for what did not look to be even anything remotely close to being offside. Common sense prevails and Arsenal have a two-goal advantage.
GOAL! Nketiah doubles the lead. The play is spread to Saka, who plays an early cross into the penalty area. Nketiah is on hand and he places the ball into the bottom corner to double his side's advantage. VAR will check this...
Arsenal lose possession on the edge of the Bournemouth box but they quickly regather the ball through Guendouzi.
Both Howe and Arteta are out in their technical areas. Arteta will be the happier of the two after Arsenal's bright start.
Chance! Willock, who is inside the Bournemouth penalty area, turns Gosling and jinks past Ake before poking the ball goalwards. Travers has his angles right though and he makes a crucial block at his near post.
Good defending! Smith whips a dangerous cross into the Arsenal penalty area but Mustafi is alert to the danger, flicking the ball away to safety on the far side.
A chance for Arsenal to break through Pepe but Gosling produces a perfectly timed to tackle to stop the attack in its tracks.
A worrying moment for Saka at the other end. He under hits a back pass but luckily for him, Martinez's starting position is good and the goalkeeper clears the ball down field.
What a great start for the visitors and the away fans are making all the noise now. That goal was made and finished by Arsenal's youngsters.
GOAL! SAKA! Willock does well to turn away from a challenge, drives forward and lays it off for Martinelli who in turn lays it off for Saka. Saka takes one touch and smashes it passed Travers at the near post. Great finish!
KICK OFF: MIke Dean's whistle gets proceedings underway. A reminder that there is VAR tonight.
Hello and welcome to our coverage of today's FA Cup fourth-round tie between Bournemouth and Arsenal, live from the Vitality Stadium.
The fifth-round draw has just taken place. The winners of tonight's tie will face Portsmouth away.
Bournemouth XI: Travers, Smith, S Cook, Ake, Simpson, Fraser, L Cook, Gosling, Surman, H Wilson, Solanke.
Subs: Ramsdale, Francis, C Wilson, Billing, Surridge, Dobre, Genesini.
Arsenal XI: Martinez, Bellerin, Mustafi, Sokratis, Saka, Guendouzi, Xhaka, Pepe, Willock, Martinelli, Nketiah.
Subs: Leno, Maitland-Niles, Holding, Torreira, Ceballos, Ozil, Lacazette.
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