Today is the big day.
The day that starts with an empty sheet and 68 names and finishes with just one above the rest.
When filling out your brackets, there is one thing you can take for certain. Upsets will happen.
Where those upsets will occur is the question everyone wants to know.
Whether you rely on research, your instincts, sleepers, favorites or on pure guts, you need a strategy for filling out your bracket.
Before you fill out your bracket, give a minute to think about these 10 teams who could shake things up.
Here are the 10 most dangerous teams to play come next week.