If Brazil plays with the Croatia the same way Brazil played with the Koreans, then probably Croatia will have little chance, because even if the entire Croatian team sits on defense, it is unlikely to help, Brazil will still find a way to score.
Apparently, the Croats will have to try to play second-string first and look for chances in counter-attacks.
The Netherlands have a better chance against Argentina. A lot will depend on Messi, if he can score a couple of goals alone, then most likely Argentina will pass, if not, then the chances are equal.
There is no doubt that Brazil will qualify for the semifinals if Croatia plays like they played with Koreans then also Brazil will defeat them but it will be a little tough match for them.
The match between Argentina and Netherland is very unpredictable any team can win the match. If Messi is in action mode on the match day then their is a chance for Argentina to qualify for the semifinal.
I know a lot of people see Argentina as the favourite, in the Argentina-Netherlands game. The Netherlands has a very good defensive line. You definitely need to think about this. Argentina could be knocked out by the Netherlands. The Netherlands is a very strong team. It will be a game where both teams will be aware that they have to win this match to claim the championship.