Cristiano Ronaldo criticised Iceland after the plucky minnows claimed a 1-1 draw against Portugal in their Euro 2016 opener.Portugal wasted a series of chances and were held in the Group F clash in St Etienne after Birkir Bjarnason cancelled out Nani's opener.Ronaldo told several national newspapers: "It was a little bit frustrating, we tried hard to win the game, Iceland didn't try anything."They scored a goal, they created two chances in the 90 minutes and otherwise they got every player behind the ball, they put the bus in the net."So it's difficult when one team don't try, but Portugal try and play football and try to win the game."Iceland didn't try anything, they were just defend, defend, defend and playing on the counter-attack. It was a lucky night for them."The game marked Iceland's first appearance at a major tournament, and the country is the smallest to feature at a European Championship, with a population of just 330,000.Ronaldo, who spurned a number of chances himself, said: "I thought they'd won the Euros the way they celebrated at the end, it was unbelievable."When they don't try to play and just defend, defend, defend, this in my opinion shows a small mentality and they are not going to do anything in the competition."