Celtic's Managerial Dilemma After Derby Defeat

Martin O'Neill will walk back into Celtic Park on Thursday night knowing the questions are already lined up.

A 3-0 derby defeat to Rangers in a League Cup quarter-final is never just a bad day at the office in Glasgow. It becomes a referendum on the manager, the players, and the direction of the season. Former Celtic striker Cillian Sheridan believes this one will be no different – and he has gone straight to the heart of the issue: team selection.

Tounekti call leaves eyebrows raised

Sheridan could not hide his surprise at seeing Sebastian Tounekti named in the starting XI at Ibrox ahead of summer signing Haissem Hassan. Tounekti was handed the nod on the wing, with Hassan left on the bench until half-time, by which point Rangers were in complete control of the tie.

"I was surprised that Tounekti started," Sheridan said on the BBC's Scottish Football Podcast. "I thought the game was built for Hassan and to see the front three of Hassan, Kasper Hogh and Camilo Duran."

That imagined front line never materialised from the first whistle. Instead, Hassan was introduced only after the damage had begun to mount, a decision Sheridan believes always felt temporary.

"If there were worries over Hassan's fitness, you start him and give him 60 minutes," he argued. "I just knew as soon as the team was announced that that half-time change was coming."

The change did come, but by then Celtic were chasing shadows in a derby that rarely forgives slow starts or tactical missteps.

Too many players didn't show up

For Sheridan, this was not just about one selection on the wing. His criticism cut deeper, aimed at the collective performance in a fixture that demands personality as much as quality.

"I can imagine personnel changing [on Thursday] because I think there were too many players that didn't show up against Rangers," he said.

That blunt assessment mirrors the mood of a support that watched their side lose a cup tie and, more worryingly, lose too many individual battles all over the pitch. When that happens in Glasgow, attention swings quickly to the dugout.

"O'Neill will maybe take a little bit of criticism, probably for his selections and one or two subs he made," Sheridan added.

"Maybe" feels generous. At a club of Celtic’s scale, a 3-0 derby defeat in a knockout competition almost guarantees scrutiny, especially when big calls – like starting Tounekti over Hassan – backfire so visibly.

Ferencvaros, then Rangers again

There is no soft landing for O'Neill. Celtic open their Europa League campaign at home to Ferencvaros on Thursday, only three days before they face Rangers again in the Scottish Premiership.

Sheridan fully expects the manager to react.

"I can imagine personnel changing," he said, hinting that the underperformers at Ibrox may find their places under threat as O'Neill looks for a response both in Europe and in the league.

This is the reality of life in Glasgow’s goldfish bowl. One heavy defeat, one high-profile selection call that doesn’t come off, and the narrative can flip in an instant.

"At clubs like Celtic and Rangers, as soon as one bad result comes, it's magnified and the season's in crisis," Sheridan said.

The crisis talk may be premature in mid-September, but with Ferencvaros visiting and another derby looming, O'Neill now has two games in four days to prove that this was a jolt, not the start of a slide.