Callum McGregor takes aim from 25 yards.

It's not too far way from the Celtic captain. Decent effort.

Raphael Luis and Kendry Paez are off for Valentin Barco and Felix Lemarechal in the Strasbourg side.

Dimitar Mitov is keeping Aberdeen in this.

It's a wonderful save after a shot takes a wee deflection off Jack Milne.

Image source, SNS

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

He's done everything right except hit the target.

A big, big chance for Celtic.

Moments after another scare for Celtic, they surge up the other end and Kelechi Iheanacho puts wide a glaring chance.

That's a brilliant save from Dimitar Mitov.

Guela Doue should be killing this game off but the Aberdeen shotstopper keeps his side in it.

Marko Lazetic, dearie me.

It's a lovely scooped ball from Dylan Lobban and Lazetic ought to be diverting the ball into goal.

But he's unconvincing, again, and on his heels, allowing goalkeeper Mike Penders to clear.

It's a really poor effort where he just dangles an open foot.

Image source, SNS

Arne Engels has acres to run into but opts to bend one into the box first time.

It's an awful ball and the keeper claims under no pressure.

It's the same shape for Celtic, with Colby Donovan at right of the back three.

Another bright start to the half from Aberdeen.

Penning Strasbourg right back.

Triple Celtic change at the break.

Off go Kieran Tierney, Daizen Maeda and Benjamin Nygren, with Paulo Bernardo, Kelechi Iheanacho and Colby Donovan on.

Tom English
BBC Scotland chief sports writer on Sportsound

Wilfried Nancy will say this is not about the shape, but if you play two wing-backs against Roma you've got to have players who can deal with it defensively.

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Rangers head coach Danny Rohl: "Honestly, I'm very angry about our conceded goals. This is the disappointment for me. We played a solid first half, go in the lead - exactly what you want. Go in with a lead and they have to open more and more. Then the first conceded goal.

"Second half, we missed so many transition moments, and the second goal is too easy. These are the parts at the moment where we are not clinical enough.

"For the second game in the row in this competition, I see a team who is competitive and a team in a process forward, but I see a team, especially in this competition, destroy the hard work in two, three situations.

"To take something you have to be sharp for 90 minutes, 95 minutes in every duel. The chance was on today to win this game.

"I am angry about two or three mistakes, this is hard to take. From tomorrow we have to focus on big games in the league.

"What happens in the next two games is not a topic for me today. We will see what happens in this competition.

"All in all, Manny [Fernandez] and Nasser [Djiga], I see big steps forward. I am more angry about how we have our position for the long ball. I will never blame one player for one action.

"We have to be angry today. A big topic was game management and today in two, three moments, it was not right. This is what we have to learn.

"Bojan [Miovski] got a kick, but it could be a bit more."

Stiliyan Petrov
Former Celtic midfielder on TNT Sports

Evan Ferguson has been outstanding in the first half.

Typical striker - touch, turn, finish.

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James McFadden
Former Scotland forward on BBC Sportsound

Celtic look so disjointed.

They keep getting caught on the ball.

Roma deserve to be three goals in front.

Alan Hutton
Former Rangers defender on TNT Sports

I think Aberdeen will feel hard done by with the disallowed goal.

For me, it's a natural position of the arm when jumping.

Kheredine Idessane
BBC Scotland at Celtic Park

It occurred to me on Sunday that Wilfried Nancy's decision to field just three defenders was quite the gamble against the Premiership leaders, especially with Yang Hyun-Jun and Sebastian Tounekti as the supposed defensive options in the wide areas.

To do so once more against a team as good as Roma is quite baffling. The midfield and forward players can't keep the ball under the stress of the Roma press and Celtic are incredibly vulnerable defensively.

It's a ludicrously small sample size, but the opening stages of the Nancy era could scarcely have got off to a worse start.

"Boooooo!"

The Celtic fans ain't happy.

Image source, SNS

Dearie me.

Arne Engels smashes the inside of the left-hand post and the chance is gone.