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GLASGOW, SCOTLAND - APRIL 17: Martyn Waghorn of Rangers celebrates after winning the penalty shoot out during the Scottish Cup Semi Final between Rangers and Celtic at Hampden Park on April 17, 2016 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty IMages)

GLASGOW, SCOTLAND - APRIL 17:  Martyn Waghorn of Rangers celebrates after winning the penalty shoot out during the Scottish Cup Semi Final between Rangers and Celtic at Hampden Park on April 17, 2016 in Glasgow, Scotland. (Photo by Ian MacNicol/Getty IMages)