Willie Miller
Former Scotland defender

"The two Northern Ireland centre-backs have been outstanding. They communicate really well and they are strong."

Guess what? Another change. Scotland right-back Steven Whittaker is off and Derby forward Johnny Russell is on.

Neil in Belfast: "Looks like we are saving any shots for the Finland game."

Craig from Perth: "Scotland really need a bit a pace up top. Maybe someone like Stevie May."

Rob from Dennistoun: "This game is crying out for a rock star, and that rock star is stevie ruddy may."

Josh Magennis trots off after a good shift for the visitors and Wigan striker Billy McKay, formerly of Inverness CT, gets a taste of the action.

Steven Naismith peels away from his marker at a corner and his fizzing header flies straight into the hands of Michael McGovern. Moments later, the Northern Ireland keeper smothers a low strike from Matt Ritchie.

Scotland inject a bit of urgency into their passing as the ball is worked to Ikechi Anya in the penalty area. He dances one way, then the next, but can't squeeze his shot past the covering Lee Hodson.

Northern Ireland introduce their skipper for the last 20 minutes, as Steven Davis takes over from Ben Reeves and Ryan McLaughlin is on for Oliver Norwood.

Josh Magennis is in the lone striker's role for Northern Ireland now and there is not a team-mate in sight as he bundles his way to the edge of the penalty area. The Kilmarnock forward decides to have a crack, and why not, but his angled drive does not trouble Allan McGregor.

The possession stats are still heavily weighted in Scotland's favour but the action has really dried up. Northern Ireland have plugged the gaps out wide and are simply lapping up the hopeful, long balls the hosts are relying on now.

Image source, AP

More changes from Scotland boss Gordon Strachan, with striker Jordan Rhodes back for the first time since November 2013. He replaces Steven Fletcher, while James Morrison is on for James McArthur.

James in Giffnock: "Scotland should be looking to be at least 4 up by this stage on Sunday."

Just as I was praising Chris Baird, he's hooked, along with lone striker Will Grigg. Lee Hodson and Pat McCourt are the men coming on for Northern Ireland.

The home fans are just starting to get a bit restless as Scotland continue to boss the ball but without their earlier fluency. Much of that is down to how well the visitors are closing down. Chris Baird, winning his 70th cap, is doing a fine job sitting in front of the two central defenders.

Niall Murdoch on Twitter: "Let's get Stevie May and Jordan Rhodes on to bang in the goals #bbcscotfootball"

Craig Forsyth breaks forward again to gather a pass from Steven Fletcher and delivers another excellent delivery which finds Steven Naismith lurking at the near post but the Everton forward sends a glancing header narrowly over.

With Northern Ireland sitting in, I guess this is good practice for Scotland, who take on Gibraltar on Sunday. Will the semi-pros from the Mediterranean be as hard to break down?

We're up and running again...

Scotland make three changes at the break, with Steven Naismith, Christophe Berra and Allan McGregor on. I'm not sure keeper Craig Gordon touched the ball with his hands in the first half. Russell Martin and Shaun Maloney are the others making way.

Ikechi Anya is still there. He must simply be a polite lad, shaking hands with the officials earlier.

Kieran on Twitter: "Passing too slow, should be experimenting with more youngsters in games like this #bbcscotfootball #gauld #Armstrong #future."

What are NI fans making of the game so far?

Tatty from Hamilton: "James McArthur is a great player and famously does not shoot. His great strength is his solidity. He breaks up the play and drives it forward."