Michael Burgess looks at the five things learned from today's action in Brazil including the increasing pressure on the hosts.
We are watching a Mexican miracle
Mexico's swashbuckling win over Croatia today has them positioned as one of the form teams in the tournament. They look unstoppable going forward, especially on the counter attack and have one of the best midfield combinations here in Brazil. El Tri have also only conceded one goal (goalkeeper Guillermo Ochoa is having a tournament for the ages) and kept host nation Brazil at bay for 90 minutes.
It's an incredible story. Remember, Mexico were a few minutes away from missing the tournament altogether, until the USA scored a late winner to deny Panama and rescue their neighbours. Coach Miguel Herrera has unified a previously divided squad, and their self belief is sky high - it seems unlikely that Holland will be able to stop them on Monday. Get past the Dutch and they will be in the quarter finals for the first time since 1986.
Neymar comes to the rescue - but Brazil are feeling the pressure
Thanks largely to Neymar's timely first half intervention, the Selecao dug themselves out of a hole against Cameroon today but it wasn't the most convincing performance. The African side put up a better fight, but are still one of the worst teams in the tournament.
Maybe Brazil are just building steadily - they have time to improve and will fancy their chances against Chile on Sunday, with a 100 per cent World Cup record against the Andean country. But their defence still looks vulnerable, which is the key aspect as the tournament goes into the latter stages.