Grant Hanley makes a mess of dealing with a long Rep of Ireland ball into Scotland territory and it's a foul for the visitors. However, James McClean's delivery is poor and easily blocked by the Scotland wall.

We're under way!

BBC Scotland's Richard Wilson at Celtic Park

A warm handshake between Gordon Strachan and Martin O'Neill after the national anthems.

...It's time for the national anthems.

Brian fae Forfar: Great result for Poland! I wonder how Scotland will do tonight?

Bringthemonjpn: "#bbcscotfootball This will be Naismith's night."

Old friends met up at Celtic Park ahead of tonight's Euro 2016 encounter.

Image source, SNS

Robbie Keane, on his return to former club Celtic, will be cooling his heels on the bench when the game gets under way.

Image source, SNS

Alex in Glasgow: "The match should be delayed to 8pm to allow the Scottish fans to get there."

bringthemonjpn:, external Huge match. Scotland have a couple of Big Boydie look-alikes that we can throw in, so feeling good about our chances.

Mikey: "An Irishman called English wanting Scotland to beat Ireland?! Lucky I've no' been on the bevvy today?!"

Scotland: Marshall, Whittaker, Russell Martin, Hanley, Robertson, Maloney, Mulgrew, Brown, Anya, Naismith, Steven Fletcher. Subs: Gordon, Chris Martin, Berra, Dorrans, Bannan, Greer, Darren Fletcher, Burke, Russell, May, Gilks.

Rep of Ireland: Forde, Coleman, Keogh, O'Shea, Ward, McGeady, Hendrick, Gibson, McClean, Walters, Long. Subs: Randolph, Clark, Christie, Keane, Meyler, Pilkington, Brady, Quinn, Pearce, Murphy, Given.

Referee: Milorad Mazic (Serbia)

Canadian warbler Bryan Adams is singing at Glasgow's Hydro tonight. Here's hoping he doesn't take a wrong turn and end up at Celtic Park.

Which of his songs would be apt for tonight's clash? Will one set of fans be on "Cloud Number Nine" or will one of the manager's ask his players "Do I Need To Say The Words?" if they're trailing at half-time?

Image source, Getty Images

With their Euro 2016 hopes on the line, will either side be singing "There Will Never Be Another Tonight"?

You must be able to do better than me....

Tweet using #bbcscotfootball, text 80295 or visit our Facebook, external page with your musical offerings.

BBC Scotland's Alasdair Lamont at Celtic Park

OK, so now I'm starting to get a bit excited in the way I haven't done about a Scotland match for years.

Maggie in Milngavie: Just to wish the Scotland team all the best for tonight and make all of Scotland and Chick Young proud of our team. Love the show.

Anon: Kick off needs to be delayed. Huge traffic chaos at Cumbernauld.

You've been discussing tonight's Euro 2016 clash on our Facebook, external page.

Lee Willox: It'll be a sad state of affairs should Aiden McGeady get booed.... there's plenty anglo-scots in our squad and I aint heard the Tartan Army boo any of them on the ball. If it happens it happens tho....

Roy Crawford: It [booing] never usually works anyway. It'll only make him more determined. Good luck to him and good luck Scotland.

Pat Nevin believes the wide men hold the key to Friday night's Euro 2016 qualifier between Scotland and the Republic of Ireland at Celtic Park.

And the 28-time capped former Scotland winger believes the hosts will edge it.

Image source, PA

"If Ikechi Anya's playing on the left against Seamus Coleman, who is a fantastic player but he's not at his best, he has to be got at," said Nevin.

"Aiden McGeady's on fantastic form and we're missing Alan Hutton, so the wide areas could be important in this one.

"It's very close to it - it's certainly a must-not lose [for Scotland].

"If we win we're back in the mix, if we draw we're not out of it, if we lose we're up against the eight ball and I just can't see us getting through, so do not lose this one."

What do you think of the respective line-ups? Do you agree with Tom English that tonight falls into the "must win" category for Scotland?

Let rip with your thoughts via 80295, tweet using #bbcscotfootball or visit our Facebook, external page.

Scotland's Group D rivals Poland are running amok in Georgia... They lead 4-0 heading into injury time courtesy of Arkadiusz Milik's goal.

The Republic of Ireland will be wary of the threat posed by Scotland striker Steven Fletcher.

"I signed him for Sunderland and my own view was that his goals were instrumental in keeping the side up, as well as Simon Mignolet's performances in goal, so the two of them can take great credit for that," said Martin O'Neill.

Image source, PA

"But he has had a few injury problems - he was injured for Scotland at the back end of that particular season and he has fought his way back, so he is in very good form at the moment."

Martin O'Neill makes five changes following the draw in Germany. Seamus Coleman, Richard Keogh, Jeff Hendrick, Darron Gibson and Shane Long start against Scotland, with David Meyler, Marc Wilson, Stephen Quinn, Glenn Whelan and Robbie Keane dropping out.