Livingston's Cristian Montano fires a left-footed shot just past Joe Hart's right-hand post.

The players are back out on the pitch. Can Livingston produce a miraculous turnaround?

They've brought on Morgan Boyes for Ayo Obileye in defence.

Celtic will look to pick up the intensity again.

Here's a look at the two quick goals at the end of that first half.

Image source, SNS

Image source, SNS

Tom English
BBC Scotland's chief sports writer

Where is the joy in this if you're Ange Postecoglou? For many weeks of your league season, it's a grim battle against 10 men behind the ball, it's the same challenge in a lot of weeks, too many weeks.

Here's a manager who wants his players to be challenged. It's a bit boring, isn't it?

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

It's absolutely incredible, to think that Celtic were 2-0 up going into half-time, 45 minutes gone on the clock. A ball played up, It was more strength than anything else, Nicky Devlin holding off Taylor and putting it past Joe Hart from seven or eight yards out. It's a wonderful moment for Livingston to get them back into this game

A thoroughly dominant half from Celtic, who went ahead through Ayo Obileye's own goal.

Kyogo looked to have put the game beyond Livingston right on half-time, but a goal 90 seconds later from Nicky Devlin means we still have a game on our hands!

Image source, SNS

There were exactly 90 seconds between Celtic's second, and Livingston's first goal.

Livi are averaging less than one completed pass per minute so far.

With 40 minutes gone, just 37 passes have found their mark.

This touchmap shows you just how hard they are finding it to get up the park.

Image source, Opta

Allan Preston
Former Livingston manager on BBC Sportsound

If Livi can get to half-time 1-0 down, Davie Martindale will regroup. They have worked their socks off, as they always do. As long as it's 1-0, Livi will fancy getting something out the game.

Update...Joe Hart punches the corner clear, and cleans out Anthony Ralston.

The full-back is on the deck after that haymaker. But he shakes it off again.

Big news, Livingston have a corner...

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

We spoke about why Livingston go with three at the back. It's just numbers, getting numbers into areas where they can get a block because Celtic will cut you right open.

Martin Dowden
BBC Sport Scotland at Celtic Park

It's been all Celtic and with that defensive door now unlocked, you sense they are keen to end this as a contest as quickly as possible.

One-way traffic doesn't do this spectacle justice. All of the action is in Livingston's half of the pitch.

I've only just noticed Joe Hart is wearing black which tells you something.

This is relentless. Livingston simply can't get on the ball or up the pitch.

A relatively swift decision. The replay appears to show the ball striking Devlin's arm, but it's sort of by his side.

I think they're being less punitive with handballs than they were before the break.

Celtic are claiming for a penalty. Reo Hatate's shot was blocked by Nicky Devlin, and it certainly looked like it hit his arm.

VAR check incoming.

Liel Abada took the credit from his teammates, but there's no chance he'll get awarded that goal.

Can't complain at an assist though.

Image source, SNS

Image source, SNS