Read our match report from St Mary’s:

That was a totally different Southampton, and they punished a hastily patched-up Arsenal, who looked particularly frail at the back. Neither Stephan Lichtsteiner, the returning Laurent Koscielny nor Bernd Leno covered themselves in glory. Plenty of food for thought for Unai Emery. For Saints, Danny Ings was a real livewire, and scored two beautiful headers. In the end it was Charlie Austin who popped up with the winner, a player many have said will not fit Ralph Hasenhüttl’s high-pressing style. He made the difference, though. Pierre-Emile Hojbjerg played a cute through ball into Long for the winner, and the captain seemed to relish the responsibility of wearing the armband. Alex McCarthy made some key saves, while Redmond was busy before being forced off.

Free pints and three points for Southampton. Danny Ings and Charlie Austin try to sum it up. “The gaffer’s brought in new ideas to not just the first-team changing room but the whole club,” Austin says. “A new manager comes in with new ideas, all of the sudden the lads get a bit of a rocket and start expressing themselves and it just didn’t work under Mark Hughes, we just didn’t get the right result. We have got a big Christmas coming up, with Huddersfield and West Ham here. We have to try and take six points from those.” As for Ings, he adds: “As a club we know the position we have put ourselves in, but we have shown today that we can really turn it around. We are moving in the right direction.”

Ralph Hasenhüttl bounces on to the pitch. That’s lift-off! The new era is very much under way at Southampton. Arsenal’s 22-match unbeaten comes to a grinding halt on the south coast. Charlie Austin’s late winner lifts Southampton out of the bottom three, while Arsenal stay fifth, three points behind Chelsea, who have just wrapped up victory over Brighton in Sussex. It was a game teeming with great goals – and two wicked deflections – but when it mattered most, Austin had a cool head to apply a fine finish, heading in Shane Long’s lofted cross.

90+5 min: Shane Long is booked for a flailing arm on Monreal.

90+4 min: A wry smile from Valery, after shielding off a late Arsenal challenge on the byline. McCarthy will boot the goal-kick upfield.

90+4 min: Stuart Armstrong is replaced by Tyreke Johnson, the youngster making his debut.

90+3 min: Arsenal probe down the right through Lacazette, but Guendouzi’s header from the forward’s cross is wayward.

90+2 min: McCarthy gathers a deflected Mkhitaryan strike to much glee. Saints are seconds away from only their third league win this season.

90 min: There will be five added minutes.

89 min: A rendition of “Stand up if you love the Saints” rings around St Mary’s. Arsenal look shot. Armstrong has a free-kick, but will take an age to take it.

88 min: Arsenal try to break, but Ozil cannot read Lacazette’s dummy after more good work by Mkhitaryan. Southampton take their time to welly a free-kick upfield. Long does brilliantly to control Hojbjerg’s ball and then win a throw-in in the very corner of pitch.

87 min: Lacazette wins Arsenal a corner, but Yoshida powers the ball away. St Mary’s, for the first time in a long time, is rocking.

Leno cannot reach Long’s stood-up cross, and Austin nods in. Brilliant, unselfish work by one substitute and a fine, composed finish by another. It was a simple floated cross by Long, but Leno made a mess of it, gifting Austin the chance to head into an empty net.

View image in fullscreen

View image in fullscreen

83 min: Koscielny meets Ozil’s corner, but he slices his header! It drops inside the six-yard box but Arsenal cannot force it goalwards. Moments before, Arsenal got all intricate, with Ozil and Torreira interlinking beautifully and simultaneously causing panic.

82 min: Emery and Hasenhüttl are both getting drenched on the touchline, furiously trying to conjure up a winner. Arsenal have won more points in the final 10 minutes of matches than any other side. Can they?

80 min: Leno punches clear, and Aubameyang leads the charge on the counter! The big striker does well, funnelling down the right before playing in Mesut Ozil on the opposite flank. He dinks a ball into the box, and the legs of Aubameyang are lurking at the back post, but he cannot make any meaningful contact with the cross.

79 min: An end-to-end finish at St Mary’s, as Southampton win another corner. The last one didn’t work out too badly at all.

77 min: Arsenal break forward, with Aubameyang sliding a lovely ball across the box, but Vestergaard crowbars the ball away from the grasp of Lacazette. When Arsenal win a free-kick out of the second phase, McCarthy makes a superb stop to keep the ball out of the net, denying Lacazette’s glanced header. The flag was up, but the Southampton goalkeeper was not to know.

75 min: Shane Long scores – but the goal is disallowed! Sian Massey-Ellis, the lineswoman, flags early, and the Southampton celebrations are short-lived. The corner was whipped in, and it was an umarked Maya Yoshida who powered a header a goal, forcing Leno into an instinctive save. As Yoshida headed at goal, Long was offside and when he tapped in, the flag was raised. Ralph Hasenhüttl looks particularly deflated. Southampton thought they had a winner!

74 min: Matt Targett’s throw causes more problems than it should, with Maitland-Niles, filling in at right-back heading back into danger. Austin then makes life difficult for Koscielny, who hacks the ball away for a corner ..

73 min: Maitland-Niles replaces Lichtsteiner.

72 min: Xhaka has a nibble at Long, and Saints win a free-kick a good 35 yards from goal. But they waste it, and instead supply Arsenal with the chance to counter. Down on the touchline, Unai Emery is pounding the chest of Ainsley Maitland-Niles, revving up the young Arsenal midfielder who is about to come on.

71 min: Danny Ings will not score a hat-trick this afternoon, because Charlie Austin has just jumped off the bench to replace him. Austin will the lead the line, while Shane Long is operating out wide on the right.

70 min: Armstrong chops down Lichtsteiner and Arsenal win a free-kick on halfway. Mesut Ozil is on, but looks absolutely freezing. He will have warmed up, won’t he?

69 min: Alex Iwobi is replaced by Mesut Ozil.

67 min: McCarthy plays his team-mates into sixes and sevens at the back, rushing out of goal and not claiming the ball. Aubameyang tried and failed to fashion a clear shooting opportunity, before Iwobi pinged in a dangerous cross. His ball actually squeezes underneath the Southampton goalkeeper, but he just about did enough, grabbing the ball at the second time of asking.

66 min: Arsenal attempt to raid down the right through Mkhitaryan and Lacazette but a handball stifles their attack. Southampton have not exactly gone to pieces since that goal, but they are yet to truly test Bernd Leno. Meanwhile, Emery has just appeared to give Mesut Ozil the nod on the substitutes bench.

64 min: Valery makes a clean sliding challenge on Nacho Monreal. The Saints faithful enjoy it, as you’d expect. Can either team find a winner? Over in Sussex, Solly March has pulled a goal back for Brighton at home to Chelsea.

63 min: Arsenal have become a little pedestrian. Koscielny has been in the wars on his comeback, this time taking a whack from his own team-mate, Stephan Lichtsteiner who was trying to rob the ball away from Shane Long.

62 min: Here comes Shane Long! He’s on for Nathan Redmond.

61 min: Targett eventually swings in the free-kick, but Koscielny heads clear. Southampton look to sustain the pressure down the left.

59 min: Redmond gets the better of Koscielny, and the Arsenal defender tugs at his shirt and pulls him down. A cynical challenge, one that earns a booking. Redmond requires a dash of treatment. Southampton have a free-kick, 25 yards from goal.

58 min: Ings is still going up top, but he’s the only outlet for Southampton. Redmond has been shackled more this half. Arsenal seem to find a different gear when the clock restarts for the second half. Seconds later, a half-chance for Targett goes begging after Leno fails to reach an arrowed cross.

56 min: Koscielny and Lichtsteiner double-up on Nathan Redmond, with Saints guilty of getting sloppy. Arsenal seize possession and stride forward once more. Only one team look like scoring now.

55 min: Lichtsteiner wants a foul after falling under the challenge of Oriol Romeu, but has to make do with a corner. Torreira swings it in, but Xhaka’s volley from distance is blocked by Southampton. Arsenal go again!

54 min: Iwobi skies an effort! Aubameyang is played in down the left channel in acres. He dances inside, before rolling the ball back for Iwobi to have a go. He attempted the Thierry Henry-bend-into-the-far-corner but got it all wrong. A big chance for Arsenal to take the lead for the first time at St Mary’s.

It’s a wicked deflection, but Arsenal pull level. Romeu is hounded out by Lacazette on the edge of the box. He finds Mkhitaryan, who tries his luck and the ball cannons off Vestergaard, wrong-footing Alex McCarthy and rolling into the net.

View image in fullscreen

51 min: The ball keeps coming back at Southampton at the moment, with Arsenal attempting to assert some authority on this game.

50 min: Bednarek clatters Lacazette, and is booked for his efforts.

49 min: Torreira does superbly on halfway, robbing Armstrong of the ball and plenty of dignity in one fell swoop. Southampton were knocking it about neatly, but Torreira had had enough and stole in to kickstart another move forward.

48 min: Southampton are pressing like no tomorrow, wooing home supporters with every next charge towards an Arsenal player. Monreal’s back up and moving, and Aubameyang in the mood, alongside Lacazette up front.

47 min: McCarthy spreads himself to deny Aubameyang! It was a lovely intricate pass by Mkhitaryan to the striker, and the Southampton goalkeeper makes himself big, as they say in the business. And now Arsenal have another defender grounded, with Nacho Monreal pulling all sorts of faces.

46 min: Koscielny, perhaps understandably, seems a yard or two off the pace. He dallies and an early straightforward ping upfield from out the back is blocked by a ravenous Ings. Arsenal break forward regardless.

46 min: Arsenal get things back under way at St Mary’s. Alexandre Lacazette is on for Unai Emery’s side, in place of the injured Hector Bellerin. That will surely mean a change of system too, a move back to a back four.

Looks like Alexandre Lacazette could be on at half-time ...

Down at Brighton, Chelsea are cruising 2-0, with Eden Hazard doubling their lead. At St Mary’s, Danny Ings’s header before the interval extends a pointless but intriguing half-time stat: Arsenal haven’t led at the break in any of their 17 Premier League games this season (D12 L5). They tend to be a different beast in the second half, though.

Two marvellous Danny Ings headers are the difference at the break, with the Saints striker scoring either side of Henrikh Mkhitaryan’s leveller. Ralph Hasenhüttl, the man nicknamed “Alpen Klopp” in Germany will be delighted, and has had to rein in the celebrations. The Mauricio Pochettino-Ronald Koeman high-press is very much back in town, while Arsenal defensively have shown shades of defensive vulnerability. Pascal Cygan and Igor Stepanovs have both been mentioned, which speaks volumes.

45+2 min: Targett gifts the ball to Mkhitaryan but Arsenal fail to profit, with Aubameyang running into trouble. Targett, in fairness, is quick to hold his hands up and apologise, after buying a foul out of the Armenian a moment later.

45+1 min: Danny Ings is causing havoc for Arsenal. The Saints striker is running round like a man possessed; he’s supercharged and very much setting the tempo.

45 min: There will be two added minutes at St Mary’s. Bellerin is down receiving treatment, and looks set to be replaced.

Saints are back in front! Ings loops a header into the far corner beyond Leno. It was a result of a fine counterattack, after McCarthy snatched Bellerin’s cross away from the grasp of Pierre-Emerick Aubameyang. Redmond, in the end, is played in on the right and his floated cross is nodded home by Ings. A lovely goal.

View image in fullscreen

42 min: Armstrong plays the corner short to Redmond, and his effort is comfortably cleared by Arsenal. The visitors break on the counter through Alex Iwobi and suddenly Southampton have some defending to do.

41 min: Saints win a corner, after good work by Valery down the right.

39 min: Romeu hands over the baton to Armstrong on the edge of the box. He glides past a couple of Arsenal shirts, but his shot is a daisy-cutter. That’s no problem for Bernd Leno. Arsenal look to kick on again.

38 min: Arsenal are knocking the ball around nicely, diffusing the Saints tempo a little. The last time they had a spell like this, they ended up with the ball in the net. They have struggled to create chances. Southampton, though, have been a handful down the left flank, with Matt Targett and Stuart Armstrong proving tricky customers.

35 min: Koscielny leaves Ings in a heap, but play is waved on. The Arsenal skipper got his big toe to the ball, but they cannot make the most of it on the counter.