Which four teams will go to the semi finals of the world cup and why?

I do agree with your semis list... But i think the finalists will be Sri Lanka vs Australia (or Pakistan).. Saffers are a very good unit but they have a bad tendency to choke in important games like India.. So i do not bet my money on SA... I'm gonna have a good look at Pakistan's next match against a big team and decide if they're gonna be in the finals.