If only Hamilton Accies were in the Champions League.

As warm-ups go, this was as straightforward as it gets with goals from Stuart Armstrong, a brace from the excellent Scott Sinclair and a debut goal from Odsonne Edouard to send Celtic onto their 54th unbeaten domestic game. Not even a late consolation for Accies could blot the copybook.

The Parkhead side have not lost a game to domestic opposition since May 2016 and on current evidence look unlikely to relinquish that record any time soon.

Problem is, though, that a chilly Friday night on a hard, plastic surface has few commonalities with what Celtic will face on Tuesday evening when they face the glitzy glamour of this summer’s heavy spenders Paris-Saint Germain in the Champions League.

Still, though, with Patrick Roberts returning to Celtic in the kind of form he left off in, the Parkhead side did all they could to go into that game on the back of another sound domestic showing.

For 67 minutes Roberts, along with Scott Sinclair, was the catalyst for the manner in which Celtic put Accies to the sword. He still needs match fitness but it will interesting to note if the winger can take some of that confidence and trickery into the Champions League.

There was further good cheer, too, with 19-year-old French striker Edouard enjoying a fine first outing for the club. In addition to getting onto the scoresheet he had a hand too in the goals.

Roberts and Edouard’s night was best encapsulated with the fourth goal of the evening when a one-two between them result in the raking, physically imposing Edouard claiming his first for the club.

And while Roberts has not played a full game since the Scottish Cup final four months ago, prompting Rodgers to remark that the player needs to build up his match sharpness, on this form the player looks capable of giving defenders the same kind of nightmares that he did last term.

Celtic’s pursuit of Roberts this summer became a long running saga as negotiations dragged between the Parkhead side and parent club Manchester City, but it is clear that the teenager offers Rodgers’ side something extra with his forward forays.

One moment in the early stages of this game crystalised that with the player deftly using the back of heel to lift the ball further down the wing to take out his man and latch onto it, and although the move ultimately came to nothing it posted notice of the quality the player has.

As Celtic look to PSG on Tuesday night as the curtain comes up on their Champions League group campaign, it is the likes of Roberts to whom Rogers will look for something that little bit special.

Of course, it is one thing to turn it on against Hamilton Accies –who haven’t beaten Celtic on their home ground since 1989 – and quite another to do it against a team who boast a £400m forward line.

With Leigh Griffiths out of this one as a precaution given the kick he took to his calf on Monday night on Scotland duty and Moussa Dembele pushing to win his fitness race, Celtic too will have a different look to them when they play the glamorous Parisians.

Encouragingly, for Rodgers, though, this was more of the same from his side.

There was satisfaction to be drawn from the fact that both Roberts and Edouard were involved in the build-up to the goals in the opening period.

Roberts had a hand in the opening goal after teeing the ball across the box and into the feet of Callum McGregor.

McGregor’s effort was blocked but as the ball broke to Armstrong, the Celtic midfielder stepped inside and sent a curling right-foot shot arching beyond the reach of Gary Woods in the Accies goal.

The hosts, who had gone into the game on the back of a couple of decent results of their own, soon wilted under the increasing pressure that Celtic, with their noses in front, subjected them to.

There was an inevitability about the second and shortly before the half hour mark it was delivered.

The powerful and direct running of Edouard at Hamilton invited a tackle on the edge of the box from Scott McMann and as the ball broke to Sinclair on the edge of the box. The Englishman calmly collected before dispatching a curling effort from the edge of the box.

Hamilton attempted to reply with Ali Crawford testing Craig Gordon from distance but it was Celtic who always looked more threatening in the attack.

With an attacking triumvirate fielded by Celtic with Roberts, Edouard and Sinclair, it was a Hoops side with pace and menace. It will have offered enough of an indication to domestic defences that this is a Celtic team who will continue to torment but the real barometer of where they are will come in the unforgiving environment of the Champions League.

The third goal came on the cusp of the break as Sinclair’s effort came off the post but rebounded kindly for the player to turn it in at the second attempt.

There was little for them to cope with at the other end of the pitch as Hamilton, spooked by the first-half onslaught, rarely ventured forward.

That meant an easy night for Jozo Simunovic and his central defensive partner for the night, Mikael Lustig. With Simunovic the only fit natural centre-half at the club it will be interesting to see whether that same pairing is kept together for the visit of PSG.

With Siminovic taken off in preparation of Tuesday midway through the second period and replaced by Nir Bitton, Accies pulled a goal back when sub Alex Gogic powered a Crawford corner past Gordon.

The poor defending will give ample food for thought this weekend.