Late yellow card for Widgren, who brings an end to an Arsenal attack.
90' +2
R. Nelson enters the game and replaces A. Iwobi.
THREE minutes added on at the end of the second half. Arsenal are on their way, although they've had to endure a few bumps.
Final change from Arsenal sees Iwobi, who has just gone down with cramp, replaced by Reiss Nelson.
90' +1
SAVE! It's not Welbeck's night. The tired Ostersunds defence is leaving gaps and the English forward looks to exploit them, cutting inside onto his left and forcing Keita into action. Again it's an easy finish, again it's disappointing from the former Manchester United man.
89'
We've just seen the most exciting thing to happen in an Arsenal attack- and it was only because the referee took a comical tumble on the halfway line when the Gunners were pushing forward.
88'
H. Mkhitaryan gets yellow.
Mkhitaryan picks up a late booking for a clumsy, tired challenge.
87'
Ostersunds are tiring and the ball is sloppily given away to Chambers, who plays the ball off to Iwobi and the Nigerian fires a poor effort well over the bar.
86'
CHANCE! Willock has the opportunity to score his first goal for the Gunners after Elnent works it wide but his shot is blocked. Kolasinac then attacks down the left and wins a corner.
84'
CHANCE! Islamovic latches onto the end of Ghoddos' ball into the middle and it bobbles just wide of the target, with Ospina beaten.
81'
F. Arhin enters the game and replaces J. Hopcutt.
Final change for Ostersunds, as Hopcutt's evening comes to an end. He's been superb tonight and deserves his rest. Arhin is his replacement.
79'
C. Edwards gets yellow.
Edwards is the second player to be booked tonight after kicking the ball away in frustration.
Minute
Description
78'
Ostersunds have seen plenty of the ball since the break and Sema, who tucked home his side's second tonight, has been fantastic.
76'
J. Willock enters the game and replaces J. Wilshere.
Arsenal follow suit with a change of their own, introducing Joe Willock in place of Wilshere. Sunday's cup final is probably in Wenger's mind.
73'
D. Islamović enters the game and replaces R. Mukiibi.
Second change of the game for Ostersunds, who bring on new signing Islamovic from Mukiibi. That in itself shows attacking intent.
71'
Arsenal get it away and changes are afoot for Ostersunds, who know a goal will put the tie in the balance again.
70'
Hopcutt again tests the Arsenal defence, pushing forward from a deep position, and he wins his side a corner.
68'
SAVE! Remember what I said about Welbeck a few minutes ago? He's proven my point here. Iwobi does brilliantly down the right and clips a ball into the middle for the forward, who has the goal at his mercy but heads straight into the hands of Keita.
67'
Ostersunds have still not given up and they continue to look threatening when they get forward. A crucial intervention from Holding prevents Hopcutt from bearing down on goal, as Arsenal now look to go through the gears.
65'
There's many Arsenal players who have disappointed tonight but Danny Welbeck in particular will have hoped for much more. He's had a torrid time with injuries but he hasn't really shown anything to suggest the Gunners have missed much in his absence.
63'
SAVE! Elneny pushes forward and stings the gloves of Keita with a drive from distance. A comfortable height for the keeper but Arsenal are starting to find additional space.
62'
Arsenal do have a record they'll want to keep going, as the Gunners have lost just once so far this season at the Emirates Stadium. That was against Manchester United. As it stands though, they're set to win the tie but lose on the night.
60'
Half an hour to go and I'm sure all the neutrals will want another Ostersunds goal to make things delicately poised once again.
58'
STAT: Defensive improvements needed from Arsenal, as tonight marks six games in a row that the Gunners have conceded at the Emirates Stadium across all competitions. It's their worst run without a clean sheet since a seven-game spell in April 2014.
56'
Arsenal may have restored some breathing space with the score but the game is certainly not over. The Gunners are still not quite firing on all cylinders, whilst Ostersunds continue to push forward with intent.
54'
SAVE! Corner for Ostersunds, who have responded well since conceding, and it's worked short before being curled into the middle. It's flicked on and Mukiibi almost latches onto the ball ahead of Ospina, which would have been the perfect way to redeem himself.
52'
T. Tekie enters the game and replaces Hosam Aiesh.
Ostersunds make a change and it's Aiesh, the man behind the opening goal, who is replaced by Tekie. The former was struggling and looked unable to continue.
50'
Another chance for Arsenal as Welbeck beats his marker and charges down on goal but he elects to try a chip from a tight angle, which was never going to threaten Keita. That shows the forward's clear lack of confidence.
49'
For those not wanting a late night, you'll be glad to hear that Kolasinac's goal means that this tie must be decided within 90 minutes. Ostersunds need two more goals and, if they got them, they'd head through on away goals.
47'
S. Kolašinac has scored a goal for Arsenal! Assist by Héctor Bellerín.
Already better from Arsenal and Bellerin down the right, although a huge amount of thanks needs to be sent to Mukiibi.
GOAL! Relief for Arsenal! A defensive mess from Ostersunds gives Kolasinac a gift. Bellerin charged forward down the right, lofted a cross into the middle and Mukiibi misses his clearance. It falls to the Bosnian, who smashes home.
46'
G. Xhaka enters the game and replaces A. Maitland-Niles.
Change at the break for Arsenal, with Maitland-Niles replaced by Granit Xhaka.
45' +1
TWO minutes to play at the end of the first half.
45'
KICK OFF! Here we go for the second half, with Arsenal now attacking to the left and looking to save their season. A premature exit tonight would really put the cat amongst the pigeons.
44'
SAVE! Ghoddos steps-up with the resulting free-kick, firing an effort that's comfortably kept out by Ospina.
43'
A. Maitland-Niles gets yellow.
First booking of the game goes to Maitland-Niles, who brings Nouri to ground to end a promising Ostersunds attack.
42'
That sums Arsenal's evening up. Mkhitaryan clips a free-kick into the middle and it drops to Wilshere, who lashes a volley over the bar.
41'
Oh to be a fly on the wall at the Emirates Stadium for the interval. They'll be furious and rightly so.
39'
Considering Arsenal have a cup final this weekend, you'd think that the fringe players who have an opportunity tonight would take it with both hands. Instead, they're giving Wenger reasons to leave them out.
37'
The best Arsenal move we've seen so far. Wilshere drives forward and finds Bellerin on the overlap but his driven cross is put behind for a corner, which comes to nothing.
35'
SAVE! Mkhitaryan curls an inviting free-kick into the area, where Welbeck nods a header towards goal and Keita keeps it out, although he didn't know too much about it.
34'
STAT: The official timing from Opta comes in at just 70 seconds between the two goals for Ostersunds. That in itself is evidence of how poor Arsenal have been tonight.
33'
Ostersunds continue to flood forward with intent, whilst at the other end Arsenal have the threat of a wet towel.
31'
I mentioned the wealth of Arsenal fans that have stayed home this evening and it seems their team has too. An absolute shambolic display.
29'
Ostersunds can taste blood. An incredible story is developing in north London and just one more goal levels the tie on aggregate.
27'
Prior to kick-off it was noted that Arsenal have never lost a European tie after holding a 3-0 lead from the first leg. Credit where it's due, they seem intent on making history this evening.
25'
An incredible few minutes. Arsenal have gone to cruising on aggregate to being very, very nervy. The home supporters are making their frustrations known and the Premier League side need to respond.
23'
K. Sema has scored a goal for Östersunds FK! Assist by S. Ghoddos.
Just 69 seconds between the two goals, Ghoddos clipped a long ball over the top to Sema and he had room to run into.
OH MY! It's 2-0! Unbelievable! Arsenal are having a nightmare! The ball is given away sloppily, Sema turns Chambers with a fine bit of skill and then fires a fierce effort into the bottom corner. Game on!
22'
Hosam Aiesh has scored a goal for Östersunds FK! Assist by S. Ghoddos.
This would make for disappointing viewing if it was a pre-season friendly. For a knockout European tie, there's really not much going on.
GOAL! Forget what I said! Ostersunds have taken the lead! Aiesh has acres of space down the right and he charges into the area, slotting past Ospina and it clips off Chambers.
Assist Saman Ghoddos
20'
Holding is off the field receiving some brief treatment after taking a knock but he looks ok to continue, he just has to go through the standard procedure.
18'
SAVE! Sema has the game's first real opening as he forces Ospina into a save and the Colombian goalkeeper grabs onto the loose ball after parrying the initial effort.
17'
Arsenal really not performing well at all this evening, they've done nothing at all. There's plenty of empty seats at the Emirates Stadium and those that have stayed at home won't be regretting their choice.
15'
Another corner for Arsenal, which this time is played short and then all the way back to the Ospina. Not entirely sure what the plan was there.
13'
Elneny is dropping very deep, almost acting as a third centre-half alongside Holding and Chambers, which is allowing Bellerin and Kolasinac to surge forward. It hasn't led to anything of note so far though.
11'
Arsenal cannot get going at all here. They're being very complacent and are lacking the focus that Wenger called for ahead of the game.
9'
A quality move! Ostersunds fire forward and Hopcutt is involved once again, playing it inside to Ghoddos who in turn poked a ball through to Nouri. However, the skipper doesn't manage to get the ball under control inside the area and the chance goes begging.
8'
Ostersunds continue to look the better of the two sides and they're enjoying a lot of time on the ball in the early stages. Aiesh has got forward and showed exciting flashes down the left, where he could find a lot of space due to Kolasinac's desire to push forward.
6'
First break for Arsenal but Welbeck is just beaten to a through ball, giving the Gunners a corner. Mkhitaryan's delivery goes all the way through and the hosts restart their build-up from the back.
4'
The fast start from the visitors continues, with Englishman Hopcutt getting into another decent area and seeing a shot inside the area blocked.
2'
Good start from Ostersunds, who win an early corner but Sema's delivery is easily dealt with by the Gunners defence.
1'
KICK-OFF! We're underway in North London and it's the visitors who get us started, kicking to the left in the first half.
Ostersunds have also not played since losing to Arsenal last week and know they'll have a mountain to climb this evening. For the Swedish minnows though, even getting this far is considered a major success and the fans will relish the opportunity to travel to the Emirates Stadium for a knockout tie in Europe.
Arsenal XI: David Ospina; Hector Bellerin, Calum Chambers, Rob Holding, Sead Kolasinac; Ainsley Maitland-Niles, Mohamed Elneny; Henrikh Mkhitaryan, Jack Wilshere, Alex Iwobi; Danny Welbeck.
Ostersunds XI: Aly Keita; Ronald Mukiibi, Sotiris Papagiannopulos, Tom Pettersson, Dennis Widgren; Hosam Aiesh, Curtis Edwards, Brwa Nouri, Ken Sema; Saman Ghoddos, Jamie Hopcutt.
Arsenal subs: Matt Macey, Shkodran Mustafi, Granit Xhaka, Joe Willock, Reiss Nelson, Nacho Monreal, Eddie Nketiah.
Ostersunds subs: Andreas Andersson, Alhaji Gero, Frank Arhin, Samuel Mensah, Tesfaldet Tekie, Dino Islamovic, Douglas Bergqvist.
Ostersunds also make changes from last week, with two overall. Gero and Mensah drop to the bench, with their spots taken by Aiesh and Hopcutt. I'm personally hoping that Papagiannopulos has a very quiet night, as I don't fancy having to type his name out regularly!
Wilshere wears the captain's armband for Arsenal this evening but, as it stands, he's available for nothing this summer. Wenger is desperate for the England international to sign a new deal but no agreement has been reached yet. The Gunners boss also wants Welbeck to agree new terms, as he enters the final 18 months of his deal.
Good evening and welcome to our LIVE coverage of the Europa League clash between Arsenal and Ostersunds, where tonight's host hold a comfortable 3-0 advantage from the first leg in Sweden last week.
Due to the FA Cup at the weekend, and Arsenal's premature exit, Arsene Wenger's side had a week off and haven't played since their trip to freezing Sweden last week. Goals from Nacho Monreal and Mesut Ozil, either side of an own goal from Sotiris Papagiannopulos, have given the Gunners a healthy lead but they'll be expected to add to that this evening.
With the League Cup final against Manchester City this weekend, it's not a surprise to see Wenger make three changes to his side. Mustafi and Monreal drop to the bench, whilst Mesut Ozil has the evening off. Kolasinac, Holding and Wilshere come into the side, whilst youngsters like Nketiah and Nelson could get further opportunities off the bench.
FULL TIME! Arsenal have booked their place in tomorrow's round of 16 draw but it's certainly not the performance that many expected. The Gunners were poor throughout and have endured a shock 2-1 loss on the night, although they advance 4-2 on aggregate. Overall it's disappointing but they continue to charge on in Europe.
A forgetful night for Arsenal, who endured a nervy and unconvincing display. It's only their second loss at the Emirates Stadium this season and all eyes will be on tomorrow's draw. There's a number of huge sides left in the competition and, on this display, Arsene Wenger's side have a lot of work to do.
Ostersunds can hold their head high after a fantastic performance, sealing the most famous victory in their history. Their European adventure ends at 14 games but they'll have many cherished memories, especially tonight's game. Whether they'll return to the competitions remains to be seen but they've left their mark.
HALF TIME! Well well well, what a story we have on our hands here. Arsenal looked to be on easy street following their first-leg victory last week but they've been woeful here and fully deserve to be trailing. Ostersunds have been excellent, have taken their chances and can now dream of a historic result.
An extremely forgettable 45 minutes for Arsenal. They've been all over the place, sloppy in possession and offering nothing in attack. Now, they're at risk of being on the receiving end of one of the most remarkable European results we've ever seen.
What a story for Ostersunds. They caught the headlines by beating Galatasaray in qualifying, then captured the hearts of Europe again with their stellar performance in the groups. Now, they have a real chance of securing a result that will send shockwaves across the continent. This is set to be the biggest 45 minutes of their history.
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