Croatia vs Portugal prediction (DNB)

I have watched all 3 matches of Croatia and Portugal. Portugal is the team that just playing for Ronaldo. He could not do anything against Iceland Austria. It was a lucky game yesterday against Hungary where they scored 3 goals after conceded a goal. There is no team work and there is no obvious striker. Moreover, Ronaldo and Nani is not valuable in this system. On the other side, Croatia played solid football against Turkey, Czechs and Spain. I especially liked them as a back horse in Euro 2016. Teamwork is at high level. Every player has their own role. They have great midfielders, wings and striker. I just can not see that Portugal will beat them.