Portugal will be looking to repeat the highs of 2016 when they were crowned European champions.
Fernando Santos's side come into the tournament with a better-than-ever squad that contains the likes of Cristiano Ronaldo, Rúben Dias, Bruno Fernandes and João Félix.
Portugal have lost one in their last 11 internationals.
However, that was against France, a team they face in their final group match.
Andy Hunter looks at whether they could do it all over again