Martin O'Neill disclosed that Police Scotland issued a "general behaviour" advisory to Celtic in preparation for the upcoming League Cup quarter‑final at Ibrox, where they will face arch‑rivals Rangers on Sunday. The directive comes as part of a broader effort to keep order at the 50,000‑seat stadium, where authorities have decided that no Celtic supporters will be permitted to attend. This ban stems from a lingering dispute over ticket allocations between the two Glasgow powerhouses.

The tension over tickets is rooted in the last Old Firm encounter in March, which took place in Govan and was tainted by disorderly conduct from fans. That match ended dramatically, with Celtic clinching a Scottish Gas Cup quarter‑final victory on penalties after a goalless 120 minutes of play.

In the aftermath, both clubs received sanctions: each was ordered to host their next home Scottish Cup tie behind closed doors, and each was saddled with a £100,000 compensation charge payable to the opponent drawn as the away side in those fixtures. At 74 years old, the Celtic manager admitted that playing without his own supporters would feel "a bit strange," yet he expressed a mixture of nervous excitement and optimism about the high‑profile fixture. He also described the brief meeting with police officers that took place earlier in the day. "We had the police come in today, just a little 15‑minute meeting with us, just reminders of our behaviour, which I think is actually a timely reminder.

It's a good thing as well," O'Neill said. He emphasized that the police reminder was part of a wider strategy to ensure a peaceful atmosphere, noting, "Gosh, it'd be nice to have something to celebrate. I think it's just general behaviour from us." O'Neill elaborated on what the police likely considered when issuing the advisory.

"They didn't mention this but I would have assumed that one of the things that they considered is what happens on the field of play, because these things can be taken further. You don't want any sort of punch‑ups for a start; secondly, you don't want too excessive celebrations, stuff like that, if that was the case.

I mean, I'd be delighted to be celebrating something in the game. But it's the behaviour in the light of what has happened in recent fixtures." The manager also touched on squad matters ahead of the clash.

He confirmed that midfielder Mika Baur, who missed Friday's training due to a minor knock, would be back on the training pitch on Saturday. However, O'Neill has not yet decided whether recent summer signing Sam Johnstone will retain his place between the posts or whether he will revert to using Viljami Sinisalo, who began the season as Celtic's first‑choice goalkeeper. Johnstone, an experienced England international currently on loan from Wolverhampton Wanderers, made his Celtic debut in a 1‑0 Scottish Premiership win over St Johnstone at McDiarmid Park.

O'Neill remained cautious about revealing his final decision, stating, "I haven't made my mind up at all. It was a matter of getting a look at what Sam can do. It's great to have the two of them. Big Viljami has done exceptionally well for us and it was just, again, an opportunity to see what Sam can do now.

What he could do a couple of years ago was fantastic; what he can do now might be a totally different picture. I will let them know first." The broader context of the Old Firm rivalry cannot be ignored.

Historically, matches between Celtic and Rangers have been marked by intense passion, both on and off the pitch, often spilling over into the streets of Glasgow. The recent incidents have prompted Scottish authorities to adopt a more proactive stance, employing measures such as closed‑door matches, heavy fines, and now behavioural advisories to mitigate the risk of violence. The decision to ban Celtic fans from Ibrox for this quarter‑final is particularly significant because it disrupts a long‑standing tradition of both sets of supporters traveling en masse to each other's grounds.

While Rangers will still enjoy a full house of their own fans, Celtic will have to rely on a silent stadium atmosphere, a scenario that could influence the tactical approach of both managers. Some analysts suggest that the lack of vocal opposition may give Rangers a psychological edge, while others argue that the pressure on Celtic players to perform without their usual backing could galvanise the team.

Beyond the immediate match, the sanctions have financial implications. The £100,000 compensation charge, payable to the away side in each club's next Scottish Cup tie, adds a further burden to already strained club budgets. Both clubs will need to factor these costs into their financial planning, especially as they navigate the challenges of competing on multiple fronts, including domestic league, cup competitions, and potential European fixtures.

In addition to the Old Firm narrative, the broader football world continues to produce headlines. In the Europa League, Real Sociedad fell 1‑2 to Bournemouth, with Justin Kluivert and Rayan scoring to secure the Cherries' first ever European victory. Meanwhile, Crystal Palace delivered a dominant 4‑0 performance over Polish champions Lech Poznan, marking a record win in their inaugural Europa League outing. In the English lower leagues, AFC Wimbledon and MK Dons shared a goalless draw, leaving the Dons still searching for their first win of the season.

These concurrent stories illustrate the vibrant and often unpredictable nature of football across Europe. As Celtic prepares for a match played in silence, the club's leadership, coaching staff, and players must adapt to an unusual environment while maintaining focus on the tactical battle ahead.

The police advisory serves as a reminder that the sport's passion must be channeled responsibly, ensuring that the historic rivalry can continue to thrive without descending into disorder. Ultimately, the upcoming quarter‑final will be a test of discipline, strategy, and resilience for both sides.

Celtic's ability to cope without its vocal fan base, combined with O'Neill's squad selections, will be closely scrutinised. Rangers, on the other hand, will aim to capitalize on the home advantage and the absence of opposition chants.

As the kickoff approaches, all eyes will be on Ibrox, awaiting a match that promises high stakes, intense competition, and the ever‑present undercurrent of Old Firm history.