The NCAA Tournament field is down to 16 - and the top seeds are still at the top.

The field has the top three seeds in each round in the Sweet 16 for only the second time (2009) since the bracket expanded in 1985. It's tied with 2009 for the most top four seeds (14) in the Sweet 16.

Virginia had to sweat out another tourney opener. And Duke was a tip-in away from being done. But it's rare this many single-digit teams still have a shot at cutting down the nets.

Last week, #7 seed Nevada lost to #10 seed Florida, who then lost to #2 Michigan. The national championship will air April 8th on CBS, 2 News at 6 p.m. local time. (AP)