Martin O'Neill disclosed that Police Scotland handed Celtic a broad "general behaviour" advisory before the League Cup quarter‑final against Rangers at Ibrox on Sunday. The police directive means that, for the time being, no Celtic supporters will be permitted inside the 50,000‑seat arena, a decision that stems from a lingering dispute over ticket allocations between the two Glasgow powerhouses. The tension over tickets is partly a fallout from the previous Old Firm encounter in Govan back in March. That match, which ended goalless after 120 minutes, was decided by a penalty shoot‑out that saw Celtic lift the Scottish Gas Scottish Cup quarter‑final.

Unfortunately, the game was clouded by disorder among fans, prompting authorities to take a stricter stance. Both clubs have now been instructed to stage their next home Scottish Cup fixtures behind closed doors.

In addition, each side has been slapped with a £100,000 compensation charge that will be paid to the opponent drawn as the away team in their forthcoming cup matches. The financial penalty underscores how seriously the governing bodies are treating fan misconduct. 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 upcoming showdown, calling it "a great fixture." He also spoke about the brief police visit that took place earlier in the day. "We had the police come in today for a short, fifteen‑minute meeting," O'Neill recounted.

"They simply reminded us of the standards of behaviour expected from us, which I think is a timely and useful reminder. It's a good thing." He went on to say, "In the big picture, it would be nice to have something to celebrate, but we need to keep our conduct in check. The advice was very general – just to behave properly on and off the pitch." O'Neill added that the police likely considered not only the atmosphere in the stadium but also the conduct of players on the field, noting that any escalation could lead to further sanctions.

"We don't want any punch‑ups at the start of the game, and we certainly don't want overly exuberant celebrations that could be misinterpreted," he said. "I would love to celebrate a victory, but given recent events, we have to be mindful of our actions." The manager also touched on squad matters.

He confirmed 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 spot 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 Wolves, made his Celtic debut in a 1‑0 Premiership win over St Johnstone at McDiarmid Park. When asked about his role for the upcoming Govan clash, O'Neill said, "I haven't made up my mind yet.

It's a matter of assessing what Sam can offer. It's great to have both options. Viljami has performed exceptionally well, and now I need to see what Sam can bring to the table." He continued, "What Sam could do a couple of years ago was impressive; his current abilities might present a completely different picture. I'll let them know my decision soon." The broader context of the Old Firm rivalry cannot be ignored.

Historically, matches between Celtic and Rangers have been more than just football contests; they carry deep cultural, religious, and social significance for many supporters across Scotland. This backdrop often amplifies the intensity of fan behaviour, making police interventions more common when tensions run high. In recent years, both clubs have faced a series of disciplinary actions due to crowd trouble, ranging from fines to stadium bans.

The current "general behaviour" warning is part of a series of preventive measures aimed at curbing potential violence and ensuring that future fixtures can proceed safely, even if that means playing without the usual vocal support. Beyond the immediate match, the League Cup quarter‑final is a crucial stepping stone for both sides. A victory would propel the winner into the semi‑finals, bringing them one step closer to lifting the trophy. For Celtic, a win would also serve as a morale booster after the disruptive events in March, while Rangers are eager to assert their dominance at home.

The police advisory also serves as a reminder to other clubs and supporters that authorities are closely monitoring behaviour both inside and outside stadiums. The message is clear: any form of disorder, whether it be hooliganism, violent clashes, or even excessive celebrations that could incite unrest, will be met with swift action. In summary, Martin O'Neill's comments reflect a pragmatic acceptance of the police's precautionary stance. While the absence of Celtic fans at Ibrox will undoubtedly change the atmosphere, the focus now shifts to the players' performance and the clubs' ability to navigate a high‑stakes encounter under heightened scrutiny.

The upcoming match promises to be a test of discipline, tactical acumen, and the resilience of both squads as they aim to secure a place in the next round of the competition.