Martin O'Neill launched a scathing attack on Celtic fans who staged a protest during his team's Champions League match against Stuttgart, declaring their actions require their heads to be examined. The protest, which halted play, has plunged the Scottish club into a significant crisis of confidence just days before a crucial league encounter.

O'Neill's unprecedented public condemnation highlights deep-seated tensions within the Celtic support base, potentially impacting player morale and the team's focus ahead of a pivotal league game. The incident threatens to overshadow the remainder of the season for the Glasgow giants, demanding urgent resolution from club management.