Martin O'Neill disclosed that Police Scotland issued Celtic a "general behaviour" advisory ahead of the League Cup quarter‑final at Ibrox, where they will meet Rangers on Sunday. The police directive means that, under the authority’s orders, no Celtic supporters will be permitted inside the 50,000‑seat stadium, a decision that stems from a lingering dispute over ticket allocations between the two Glasgow powerhouses. The tension over tickets is partially rooted in the most recent Old Firm encounter in March, which took place in Govan and was tarnished by disorderly conduct from fans. That match ended dramatically, with Celtic prevailing in a Scottish Gas Scottish Cup quarter‑final after a goalless 120 minutes and a penalty shoot‑out victory.

In the aftermath, both clubs were ordered to stage their next home Scottish Cup fixtures behind closed doors and were each handed a £100,000 compensation charge. The sum will be paid to the side that is drawn as the away team in their respective upcoming Cup ties. 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 nerves and excitement about the high‑profile clash.

He also recounted the brief police visit, describing it as a short fifteen‑minute meeting that served as a timely reminder about expected conduct. "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. "I think it's the overall picture.

Gosh, it'd be nice to have something to celebrate. I think it's just general behaviour from us." He added that the officers likely considered not only the atmosphere in the stands but also the conduct on the pitch, noting that any escalation could lead to further sanctions.

"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," O'Neill explained. The manager also touched on squad matters, confirming that midfielder Mika Baur would rejoin training on Saturday after missing Friday’s session with a minor knock.

However, O'Neill has yet to decide whether the recently signed goalkeeper Sam Johnstone will retain his starting berth or be replaced by Viljami Sinisalo, who began the season as Celtic's first‑choice keeper. 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 on Wednesday night. O'Neill remained non‑committal about the upcoming Govan match, saying, "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 adds weight to the police warning. Historically, matches between Celtic and Rangers have been among the most passionately contested fixtures in world football, often drawing intense emotions from both fanbases.

Recent incidents of crowd trouble have prompted authorities to adopt a more proactive stance, aiming to prevent any repeat of violent outbreaks or disorderly celebrations that could jeopardise public safety. By barring Celtic fans from Ibrox, the police hope to reduce the risk of clashes that have, in the past, spilled over into the surrounding streets. The decision also reflects a growing trend across European football to impose stricter crowd‑control measures, especially for high‑risk derbies.

While the absence of supporters may alter the atmosphere inside the stadium, officials argue that the safety of players, staff, and the general public must take precedence. Celtic’s supporters, meanwhile, are likely to watch the match from designated fan zones or via broadcast, maintaining their vocal support while adhering to the restrictions.

The club’s communication channels have urged fans to respect the police directive and to continue backing the team responsibly. In addition to the on‑field tactics and goalkeeper debate, O'Neill’s comments hint at a broader strategic focus on discipline and composure. He emphasized that the team must channel its energy into a positive performance rather than relying on post‑match celebrations that could be deemed excessive under the current scrutiny. As the quarter‑final approaches, both clubs will be keenly aware that any lapse in behaviour—whether in the stands or on the pitch—could attract further penalties.

The match promises to be a test of not only footballing skill but also of the ability of both sides to manage emotions and conduct themselves within the heightened expectations set by law enforcement and football authorities. The outcome of the game will have implications beyond the immediate result; a win for Celtic could provide a morale boost for a side navigating a season marked by disciplinary challenges, while a Rangers victory would reinforce their dominance in the Old Firm narrative. Regardless of the result, the police‑mandated behaviour advisory underscores the evolving landscape of football governance, where safety and respect are increasingly intertwined with the sport’s competitive spirit.