Poland had no answer for Colombia's dynamic attack, which returned when it was most needed to oust the disappointing European side from the World Cup and improve Los Cafeteros' chances of another deep run.

Germany and South Korea represent entirely different challenges, but Mexico has succeeded against both and is proving to be a cohesive, headstrong unit ready for anything at this World Cup.

Brazil eventually broke through vs. Costa Rica, and Neymar eventually scored his goal, but the warning signs that could lead to the Seleção's World Cup downfall still remain.

It's becoming evident that the best chance for Lionel Messi and this generation of Argentina players has passed. An uninspired showing vs. Croatia was the result of few ideas, horrible errors and no spirit, and their World Cup could be ending sooner than later.