World Cup 2010

Can anyone explain the Wikipedia FIFA World Cup 2010 schedule?

I understand most, but I do not see the quarter-finals what figures are the representation in the match ups? Here is the link if you do not know where they go. http://en.wikipedia.org/wiki/2010_FIFA_World_Cup_schedule

If we adopt the round of 16, section it does match the number on the right. In the quarterfinals, it was 5 to 7, say it's winner vs. Game 5 Winner Game 7th The same applies to semi-finals, the letter next to the quarter-finals are for play, what they are. then A – C, A, Winner Match Winner C v. Hope it makes sense.

nigeria vs argentina 2010