I see interesting couples already in the first round of the playoffs. E1 - F2 and E2 - F1 (Spain/Germany vs. Belgium/Croatia), D1 - C2 (France vs. Mexico/Poland). Provided that the favorites do not fail, which cannot be completely ruled out - at least one team can surprise. But in general, as in any world championship, really deadly games will begin only from the 1/8 finals.