After brushing off a shaky start, Ange Postecoglou has hardly put a foot wrong at Celtic.
His style of football is captivating fans to the degree it practically has a trademark.
Kyogo Furuhashi and Liel Abada are two pieces of evidence pointing to a manager with an excellent eye for a player, while he's also added much-needed leadership in Joe Hart and James McCarthy.
And fans are simply liking the frank but fair cut of his jib - with his quick commendation of Rangers for responding to the recent racist incident showing a touch of class on derby week.
But Postecoglou hasn't been tested in the way he will be come Sunday lunchtime when he enters Ibrox without one soul in the crowd behind him, and he's got a fair few decisions to make.
First and foremost is his front three, which has chopped and changed week in, week out, but the brutal attacking effect has remained the same throughout.
With several bids reportedly landing for Odsonne Edouard now there's a chance he could leave by Tuesday night's transfer deadline and if that's the case, his final bow beckons at Ibrox. Would sentimentality come into Postecoglou's thinking?
Meanwhile, new man Josip Juranovic is in the mix for his debut but he'd be taking Anthony Ralston's well-earned spot while Greg Taylor, James Forrest and James McCarthy could all return from injury.
Taylor picked up a shoulder knock on Europa League duty but looks set to feature on derby day.
Potential Celtic line-up
Provisional Celtic squad
Hart
Bain
Barkas
Ralston
Juranovic
Starfelt
Bitton
Welsh
Urhoghide
Murray
Montgomery
Taylor
McCarthy
Soro
McGregor
Robertson
Turnbull
Rogic
Abada
Forrest
Furuhashi
Christie
Griffiths
Ajeti
Edouard
