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GLASGOW, SCOTLAND - FEBRUARY 01: Referee Craig Thomson holds back Celtic's captain Scott Brown during the Scottish League Cup Semi-Final football match between Celtic and Rangers at Hampden Park on February 01, 2015 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty Images)

GLASGOW, SCOTLAND - FEBRUARY 01: Referee Craig Thomson holds back Celtic's captain Scott Brown during the Scottish League Cup Semi-Final football match between Celtic and Rangers at Hampden Park on February 01, 2015 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty Images)
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Getty Images Sport Ian MacNicol