83 min: Arsenal substitution Eddie Nketiah replaces Gabriel Jesus, who was far too hot for Lens to handle in the first half.
82 min Odegaard’s inswinging corner is headed over at the near post by White. That was a pretty good chance.
81 min Arsenal work the ball beautifully to release White on the right. He feeds it into Martinelli, who tries to put Nelson clear with a reverse pass. It hits a defender and goes behind for a corner.
79 min Even at 5-0, Odegaard upbraids the assistant referee after being penalised for putting hands on Haidara. He’s been closer to his best tonight, particularly without the ball. And his volley for the fifth goal was a gem.
76 min: Lens substitution David Pereira Da Costa comes on for Nampalys Mendy.
75 min: Arsenal substitution Jorginho replaces Declan Rice, who padlocked the back door as usual. He’s fantastic.
74 min Odegaard combines with Nelson and pings a shot that deflects behind. Rice’s corner comes to nothing.
73 min Arsenal’s next three games are Wolves (H) and Luton (A). Then things get really interesting: Aston Villa (A), PSV (A, dead rubber), Brighton (H, bogey team), Liverpool (A).
70 min A corner is half cleared to White, 30 yards out. Goalkick to Lens.
69 min It’s been a good night for Kai Havertz, who has produced his best performance for Arsenal as a left-sided No8.
67 min Havertz gives the Emirates a knee-trembler with a lovely flick near the byline on the left. He gets into the area and cuts the ball back sharply to Odegaard, whose deflected shot is well saved to his left by Samba. The ball runs loose but Jesus is penalised, perhaps harshly, for his heavy-handed attempt to gobble up the rebound.
66 min: Arsenal substitution Reiss Nelson replaces Bukayo Saka, who scored the third goal and survived the usual assaults on his calves.
64 min Now Haidara is booked for wiping out Odegaard.
63 min: Lens substitution The teenager Abdukodir Khusanov replaces Jonathan Gradit – and gets booked within 20 seconds.
61 min Okay, it’s starting to peter out now. Goal difference is an irrelevance so there’s nothing much to play for. Lens are going out, Arsenal and PSV Eindhoven are going through to the last 16. But Lens will qualify for the Europa League if they draw at home to Sevilla in their last group game.
58 min Arsenal’s pressing has been very good tonight, particularly from Jesus, Havertz, Odegaard and Rice. A fit, in-form Gabriel Jesus really elevates this team.
56 min Given the scoreline, both teams are playing with impressive speed and purpose. The second half may eventually become a non-event but that hasn’t happened yet.
53 min Lens have had more of the ball tonight, 53 per cent to Arsenal’s 47. Much of that was between the fourth and fifth goals, when Arsenal took a round off, but it’s still an interesting statistic given, you know, the 5-0 scoreline.
51 min The intensity of Lens’ performance since half-time suggests they don’t concur with Marsellus Wallace’s views on pride. That’s all they have to play for tonight.
49 min Jude Bellingham’s scored again.
48 min The camera cuts to the Lens bench, where the coaching staff are giving a masterclass in the body language of the folded arms.
47 min Arsenal’s biggest victory in Europe is 7-0: away to Standard Liege in 1993 (just after four consecutive 0-0 draws in the Premier League, and we all know which gave George Graham more pleasure) and at home to Slavia Prague in 2007.
46 min Peep peep! Lens begin the most futile 45 minutes of their season.
Half-time substitutions galore
Arsenal Ben White and Jakub Kiwior for Takehiro Tomiyasu and Oleksandr Zinchenko.
Lens Deiver Machado, Adrien Thomasson and Neil El Ayanoui for Florian Sotoca, Facundo Medina and Salis Abdul Samed.
A question When were Arsenal serious contenders to win the Champions League? 2008-09? 2010-11? Easy to forget how much of a scare they gave an awesome Barcelona that year.
Here’s our Champions League roundup, which includes the other five-goal game in this group.
And here’s how the Group B table will look at full-time.
Arsenal P5 Pts12
PSV P5 Pts8
Lens P5 Pts5
Sevilla P5 Pts 2
Arsenal are swaggering into the last 16 of the Champions League as group winners. They blew Lens away with four goals in 15 exhilarating, so last season minutes, then added a fifth on the stroke of half-time.
There were five different goalscorers and, crucially, all five needed a goal: Kai Havertz, Gabriel Jesus, Bukayo Saka, Gabriel Martinelli and Martin Odegaard will all feel a whole lot better about life as they stroll down the tunnel for their Gatorade chasers.
Saka led a counter-attack, running 60 yards while waiting for support. He came infield to work the angle for a reverse pass to release Tomiyasu, who stood up a fine cross to the far post. Odegaard watched it onto his left foot and battered a volley past Samba. Lovely stuff.
A gem of a team goal on the stroke of half-time.
45 min Saka plays in the underlapping Martinelli, who indulgently crashes a shot into the side netting. A low cross would have given Gabriel Jesus an open goal.
44 min Fuchini shoots straight at Raya from 20 yards. Arsenal are hanging on their 4-0 lead here.
43 min Wahi roasts Saliba down the left and flashes another ball across the face. It’s hard to know whether Arsenal have stopped playing, Lens have started, or both. Whatever the reason, Lens have been well on top since going, er, 4-0 down.
42 min Mendy is booked for a foul on Jesus.
41 min: Medina hits the post! If only Lens had started like this. Medina pings a sweet left-footed shot from 25 yards that veers away from Raya and thumps off the post. The ball rebounds to Wahi, who is offside, but the original shot would have counted. I think.
40 min I did Raya a disservice. He punched the ball first and then followed through to flatten ‘player’ with a stiff right.
Update: ‘player’ is Facundo Medina.
39 min Lens are having a good and entirely futile spell. Raya comes for Fulgini’s free-kick, misses and seems to punch somebody in the face. Play continues and the aforementioned, not easily identificable ‘player’ gets to his feet.
37 min Wahi runs onto a through ball in the inside-left channel and whacks a cross shot from a very tight angle that flashes across the face. At first I thought Raya got a touch but the reaction of the players – and the graphic saying Lens have had no shots on target – would suggest otherwise.
36 min: No penalty! The referee signals that it ricocheted off Havertz’s leg onto his arm. Imagine how many remotes have just been flung across living rooms in the vicinity of St James’ Park.
35 min: VAR check Lens appeal for a penalty when a free-kick hits the outstretched arm of Havertz. I think this will be given.
33 min The two attacking Gabriels, Martinelli and Jesus, look particularly sharp tonight. They’ve only scored one Premier League goal apiece this season, but a first half like this should do so much for their confidence.