Derby day in Glasgow can be a daunting experience at the best of times.
But when you’re heading to the home of your fiercest rivals without the backing of any away fans?
That is something Ange Postecoglou will have to contend with in his very first taste of the world famous fixture.
As boss of Australia, he faced hostile environments and spoke previously of intimidating arenas against Kyrgyzstan and Tajikistan in World Cup qualifiers.
But being up against a partisan crowd in Govan is unlikely to compare with anything he has faced in his managerial career previously.
It will be a strange day on Sunday with Ibrox Stadium set to be filled entirely with Rangers fans for the first derby of the season.
The Light Blues rejected Celtic’s ticket request after they failed to get a guarantee that away fans will be in Parkhead for the next league meeting between the clubs.
It means Postecoglou will be the first Hoops gaffer in 27 years - and only the second in Old Firm history - to enter an Ibrox bear pit without any supporters.
The away allocation has been drastically cut in recent years with only around 900 visiting fans permitted.
But Postecoglou won’t have any support as he looks to end a miserable run of no wins in six against their rivals for Celtic.
It was a situation the Hoops faced back in 1994 when Lou Macari was in charge of the Parkhead side.
The outcome that day will give Celtic some optimism and here Record Sport looks back on how that situation came about.
No away fans? What was all that about?
It was during the 1993/94 season, when Rangers chairman David Murray was unhappy at repeated damage caused by Celtic fans in the Broomloan Road Stand which they claimed had resulted in repaid bills of more than £20,000.
Banning away fans seems extreme. What did David Murray say?
The former Ibrox owner said: “We have been corresponding with Celtic on a regular basis and it is perfectly clear from their letters that they accept no responsibility whatsoever for this vandalism.
“The cost following that match to repair damage was £7800 and we can no longer tolerate this type of destruction.
“They don’t buy our programmes or eat our fast food. But they do smash our seats.
“The board of directors has taken the decision to withhold all ticketing allocations to Celtic Football Club in respect of our next scheduled league match at Ibrox.
“Tickets will be available only to Rangers supporters. We regret the matter has reached this point.
“However, due to the intransigent attitude of Celtic Football Club and their lack of responsibility with regard to the behaviour of their supporters’ behaviour, we believe no other course of action is now available to us.”
Surely Celtic couldn’t have been happy with that. What was their response?
Chairman Kevin Kelly said: “This matter was raised at the Sottish League management committee last week when it was agreed that clubs should be responsible only for their own grounds.
“We have suffered damage at Celtic Park but prefer to keep it quiet rather than draw attention to the kind of people who do these things.
“However, banning another club’s fans is a dangerous action to take.”
That must have been daunting for Celtic. Did it have an impact?
Not really, if anything it spurred them on. John Collins scored a peach of a free kick - the first goal netted with the new Adidas Predator boots - to give the visitors the lead and it took a late Alexei Mikhailichenko goal to salvage a draw for Walter Smith's side.
What did those involved say about the experience?
Scorer John Collins said: “People talk of it as a special goal, and it was, because no other Celtic player will ever score in an Old Firm game they have no supporters at.
“But it was a hollow one too. The pleasure in scoring is seeing the joy and happiness on the faces of the people who live for your team; hearing them singing.
“They are the heartbeat of a football club but it was only my blood and the blood of my team-mates I could see pumping after the ball hit the net."
Did Celtic fans make their presence felt?
A few might have managed to sneak into Ibrox Stadium but brothers James and Kevin Sweeney hired a light plane to fly over the stadium trailing a banner reading Hail! Hail! Celts Are Here.
How was it for Lou Macari?
A strange experience, to say the least. “When I was told, I thought it was crazy. I thought, ‘Surely we can’t go there without any support?” he told Record Sport years later.
“When John scored there was a bit of movement in one area of the ground as one or two Celtic supporters had slipped in but it was almost silent and it was, quite honestly, bizarre.
“I remember Fergus McCann telling me beforehand I was going with a security guy, George Douglas.
“I said to Fergus, ‘I’m not being funny, have you been to an Old Firm? Without fans?’ It’s never happened before.
“It hadn’t crossed his mind. I said, ‘George isn’t going to be much help’.
“We’ve got to go into the lion’s den from the minute we get there to the minute we leave.”
