Well, if you have 40 000 ppl cheering for you it helps you a lot energy- wise. It is also an advantage that the players know the stadiums and are used to play there. South Korea was in the 1/2 finals in 2002 (also at home)...
I really think that Italy has the better team. They want to proove somthing after the scandal in the italian league and that may fire them up even more. Our team lost to them in march 1:4! It would be a miracle if we win against them... no matter how the game ends tomorrow, I will be really proud of the team because they got way further than ANYBODY expected...