I feel like better teams are going to next rounds all around. Luck isn't something very influencing in this tournament. If this trend goes on Brazil will very likely bring world cup to their home. I don't think Croatia can go to next round. There is huge power difference between them.
I also want to watch Brazil against Portugal soon. Their match can be the most enjoyable match in whole tournament. Cristiano Ronaldo is key player tho.
but argentina also wants to bring home the world cup, so brazil must at least miss it beating argentina if argentina makes it to the final, i'm sure this world cup will be won by a team from argentina because they always have surprises from the way they play on the field even in every game