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GLASGOW, SCOTLAND - MARCH 12: Stuart Armstrong of Celtic (L) celebrates scoring his sides first goal with his Celtic team mates during the Ladbrokes Scottish Premiership match between Celtic and Rangers at Celtic Park on March 12, 2017 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty Images)

GLASGOW, SCOTLAND - MARCH 12:  Stuart Armstrong of Celtic (L) celebrates scoring his sides first goal with his Celtic team mates during the Ladbrokes Scottish Premiership match between Celtic and Rangers at Celtic Park on March 12, 2017 in Glasgow, Scotland.  (Photo by Ian MacNicol/Getty Images)