Martin Dowden
BBC Sport Scotland at Celtic Park

For all the questions around Wilfried Nancy's approach, results and performances, this has been an emphatic answer.

Celtic have been superb in almost every area. They've created so many chances it's hard to understand how their lead is just one.

The question is whether they can sustain this level?

Rangers will know they've been incredibly fortunate not to be further behind. They remain in touch, but something has to change for them.

Yang Hyun-jun's goal separates the sides, but Celtic should be further ahead.

Rangers have been second best since the opening five minutes and have much work to do.

Image source, SNS

Rangers think they have equalised out of the blue.

Youssef Chermiti is found by a ball lofted over the home defence and the striker's low ball into the six-yard box finds Mikey Moore.

However, the winger's toe-poke finish is met with an offside flag.

Celtic continue to press and Rangers are struggling to hold on to any kind of meaningful possession.

Yang Hyun-jun sends over another dangerous cross and Luke McCowan's header is saved by Rangers goalkeeper Jack Butland.

Martin Dowden
BBC Sport Scotland at Celtic Park

His goal was quite something, but Yang Hyun-jun is having his best display for Celtic by a distance.

He's crunching into tackles like a man possessed. Celtic all over the pitch are doing just that and cutting Rangers open almost at will down the channels.

Danny Rohl might need to change this quickly.

Billy Dodds
Former Rangers striker on BBC Sportsound

Celtic could've been out of sight by now. Celtic have had chance after chance.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

It was a really good strike from Johnny Kenny. He's getting into really good positions and that one he curled around the goalkeeper.

That's a brilliant save to keep Rangers in this game.

Neil McCann
Former Rangers winger on Sky Sports

Jack Butland is under siege.

Image source, SNS

How are Celtic not further ahead?

Jack Butland produces a superb, one-handed save to deny Johnny Kenny from a low drive.

Yang Hyun-jun then prevents a deep cross crossing the line, Butland can only push it up into the air and Emmanuel Fernandez has to clear off the line.

Billy Dodds
Former Rangers striker on BBC Sportsound

Celtic have had so many chances. Fernandez looks like he's towing a caravan.

Celtic are just trying to cut through Rangers as quick as they can. They are targeting that area.

Neil McCann
Former Rangers winger on Sky Sports

That's a big chance.

It comes with a bit of luck, but Schmeichel is out so quickly.

I just wonder if Gassama should open up his left boot and slot it...

Chris Sutton
Former Celtic striker on Sky Sports

Schmeichel had committed - could he have gone round him?

Billy Dodds
Former Rangers striker on BBC Sportsound

It's such an important touch or it's a goal.

Djeidi Gassama is though on goal.

The winger has a chance to chip or go round Kasper Schmeichel, but the goalkeeper gets his body in the way and it is deflected for a corner.

Celtic are fortunate after losing the ball in midfield.

Kasper Schmeichel is caught racing out to a cross into the penalty box.

Mikey Moore has the chance to chip the stranded goalkeeper, but the winger's cross is deflected clear.

Billy Dodds
Former Rangers striker on BBC Sportsound

I think Butland should do better. Anyway, it's a brilliant strike from Yang.

Celtic have been cutting through them. He just shells a shot at the near post. Maybe the power beats him.

Image source, SNS