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European champions Portugal, also winners of the inaugural Nations League in 2019, ran out comfortable winners.
But television pictures showed Juventus star Ronaldo had a tougher time as he told to put on a face covering while sat alongside Portugal's substitutes at the Estadio Do Dragao.
Portugal were in impressive form on their return to action after a 10-month hiatus and hit the woodwork three times before Joao Cancelo fired them ahead four minutes before half-time in the League A Group Three match.
It was the first time Ronaldo had missed a Portugal game since November 2018.