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GLASGOW, SCOTLAND - OCTOBER 14: Stuart Armstrong and Andy Robertson of Scotland leave the pitch during the International Friendly match between Scotland and Portugal on October 14, 2018 in Glasgow, United Kingdom. (Photo by Ian MacNicol/Getty Images)

GLASGOW, SCOTLAND - OCTOBER 14: Stuart Armstrong  and Andy Robertson of Scotland leave the pitch during the International Friendly match between Scotland and Portugal on October 14, 2018 in Glasgow, United Kingdom. (Photo by Ian MacNicol/Getty Images)