The toughest groups are for the most part considered to be Group B, Group D and Group G. When there are three teams that look good enough to be in the round of 16, the popular nickname is a Group of Death. If Group B, the three teams are Spain, Netherlands and Chile. In Group D, it's Uruguay, England and Italy. In Group G, Germany looks a cinch to qualify, but Portugal and the United States will fight for the second spot. (The U.S. also has a history of tough games against Ghana. My friend Art, a fan of football and the show Farscape, calls the U.S. draw We're So Screwed, Parts 1, 2 and 3, in honor of three episodes from the last season of the Australian sci-fi series.)
What I would like to point out is the weakness of Groups C and H. The rules stipulate four of these teams will be in the round of 16, but my prediction is that at most one will make it to the quarterfinals, and that team will be Colombia. Group C's winner and runner-up will face the runner-up and winner from group D respectively, and Groups G and H have a similar reciprocal schedule. Because the tournament is in South America, I think Colombia might have a chance should they win Group C against whoever comes in second in Group D, but I predict here that no other team out of the other seven, Greece, Ivory Coast, Japan, Belgium, Algeria, Russia or South Korea, will win a game after the Group rounds are over.
I'll be back in early July to state if I got this right or not.