Some notes about the knockout stage:

•  3 of the 4 quarterfinal matches featured goals in the first fifteen minutes of the game.
• 20 of 28 penalty kick in the tie-breakers have been goals.
• Belgium had 38 (!) shots agains the USA.  Tim Howard.
• So far teams have averaged 0.96 goals per game in the knock-out stage.
• 50% (6 of 12) of games in the knock-out stage were tied at the end of regulation.  3 of those games went to a shootout.

Some interesting notes:

• Greece scored only 2 goals and still advanced out of the group stage.  They were also the only team to advance to the knock-out stage with a negative goal differential.
• Switzerland allowed 6 goals and still made it out of the group stage.
• Cameroon, Australia, and Honduras were the only teams that did not score a point.  Cameroon was -8 in goal differential, which was the worst in the group stages.
• Croatia scored 6 goals and did not advance.
• Italy, Ecuador, and Russia allowed only 3 goals in the group stage, but none of them managed to advance to the knock-out round.
• Every team with a positive goal differential advanced to the knock-out stage.  Uruguay, Nigeria, and the USA advanced with goal differentials of 0.
• Ecuador and Portugal both scored 4 points, but neither advanced.
• The Netherlands scored 10 goals in the group stage.
• Teams averaged 1.42 goals per game in the group stage.
• Teams scored 0.8 goals less in regulation in the knock-out stages compared to the group stage.
• Belgium was the only to team to win their group without scoring the most goals in their group.

Cheers!