Gary Lineker introduces live coverage of the Euro 2016 group game between Portugal and Iceland in Saint-Etienne.Iceland are making their debut at a major tournament but their squad contains several talented players – such as Swansea midfielder Gylfi Sigurdsson, who was their top scorer in qualifying with six goals.As ever, Portuguese hopes rest largely on the brilliance of Cristiano Ronaldo. The Real Madrid superstar has won virtually every conceivable honour at club level, but chances are running out for him to lift silverware with his country.There's another chance to see full coverage of one of today's Euro 2016 group games later on BBC Two from 0200 to 0340.