GLASGOW, SCOTLAND - APRIL 19: Celtic's Benjamin Arthur in action during a Scottish Gas Scottish Cup semi-final match between Celtic and St Mirren at Barclays Hampden, on April 19, 2026, in Glasgow, Scotland. (Photo by Ross Parker / SNS Group)

GLASGOW, SCOTLAND - APRIL 19: St Mirren's Killian Phillips pleads with referee Matthew MacDermid during a Scottish Gas Scottish Cup semi-final match between Celtic and St Mirren at Barclays Hampden, on April 19, 2026, in Glasgow, Scotland. (Photo by Ross Parker / SNS Group)

GLASGOW, SCOTLAND - APRIL 19: St Mirren's Liam Donnelly has a header on target under pressure from Celtic's Yang Hyun-Jun during a Scottish Gas Scottish Cup semi-final match between Celtic and St Mirren at Barclays Hampden, on April 19, 2026, in Glasgow, Scotland. (Photo by Ross Parker / SNS Group)

GLASGOW, SCOTLAND - APRIL 19: St Mirren's Liam Donnelly has a header on target under pressure from Celtic's Yang Hyun-Jun during a Scottish Gas Scottish Cup semi-final match between Celtic and St Mirren at Barclays Hampden, on April 19, 2026, in Glasgow, Scotland. (Photo by Ross Parker / SNS Group)

GLASGOW, SCOTLAND - APRIL 19: St Mirren's Grant Tamosevicius during a Scottish Gas Scottish Cup semi-final match between Celtic and St Mirren at Barclays Hampden, on April 19, 2026, in Glasgow, Scotland. (Photo by Ross Parker / SNS Group)