The Sweet 16 field is set.
There have been many upsets so far, with Pittsburgh and Louisville being knocked out.
Some surprise teams are still dancing, including Richmond and Butler.
The Sweet 16 round is when the great teams start to separate from each other. Are Butler and Richmond for real?
We will find out when they face two of the best teams in the country.
Speaking of the best teams: Which ones are currently the best teams in the country?
Here is a ranking of the 16 teams left in the tournament.