Let the guessing game begin! Even though Louisville, Kansas, Indiana and Gonzaga are holding down the top spot in their respective region, the 2013 NCAA Tournament looks like a wide-open race with no one team appearing to be the hands down favorite to win it all. Either way, the tourney should be exciting, fun to watch and an ulcer waiting to happen. Yay!

Round 1 begins on Tuesday. 

Hit the thumbnail to see the bracket breakdown of the West and East region.

[via USA Today]