Argentina V.s. Nigeria
It's firmly established that Lionel Messi is the savior of Argentinian hopes and dreams, but you have to wonder if anyone else can do it. Argentina's booked into the next round but Nigeria isn't...if the Argentine's use the match to rest Messi and warm up his understudies for a 2nd round run, the Super Eagles could spring a surprise (or at least grab a point) and move on as well.
Iran V.s. Bosnia-Herzegovina
The Iranian dream lives on. But it all depends on how they fare against the already ousted Bosnians. Bad luck and missed calls have stymied the debutantes at the cup, but they could easily take this match and spoil the Iranians hopes and dreams...OR...Carlos Quieroz could finally find the cojones to draw up some specific plays for Reza Goochenajad and try to grab the full three points, putting pressure on Nigeria to definitely get the win (as goal differential only barely favors the Africans)
France V.s. Ecuador
Les Blus have looked absolutely dominant for most of their tournament so far...but they are French and it could all slip away in rapid fashion of Ecuador trounces them and Switzerland trounces Honduras. That might take some doing (especially given the sputtering offenses of their rivals) but never bet against the French disaster. Ecuador likely can't be confident in just taking a point as Switzerland has looked far better than Honduras thus far, and La H is already packing it in.
Switzerland V.s. Honduras
With Honduras eliminated they can do one of two things: a) roll over and play dead letting the Swiss steamroll them and head on to the next round, or b) play the same ugly, aggressive, haphazard brand of futbol they've played before, and force the Swiss to sneak a point or two en route to making the next round. Basically, everything's coming up Swiss.