Safe to assume no teams from Asia or Africa make the round of 16?
It depends how South Korea plays against Sweden, and Senegal/Egypt/Tunisia of course.
I'm also reticent to write off Iran, but the two games in front of them are so difficult. Nigeria and Morocco I can't give any chance at this point, but I remember Nigeria played horrendous against Iran in 2014 and still advanced. Croatia also lost to Iceland in the qualifiers and they have another difficult game. So who knows? Australia could turn up to play against Peru and Denmark as well.
The great thing about the World Cup, is simply that teams can shit themselves in the first game and fix it by the third. Spain lost in 2010 to a horrible Swiss team, prior to the more talented current Swiss generation. I mean, that team was really awful, and it didn't make any sense, but that's what happens in the World Cup. Morocco could always recover their f***ing up by beating Portugal and Spain. These things do happen.
Even though there's always groups that make you think a team should finish with 9 points, it's always only half or less of the teams that finish with 9 points. In 2010 only 2 teams won all their group matches and that was a year with some seriously imbalanced groups, with results that actually seemed quite obvious, yet they weren't.