HOUSTON - MARCH 28: Detail of basketballs before the third round game of the South Regional between the Stanford Cardinal and the Texas Longhorns as part of 2008 NCAA Men's Basketball Tournament at Reliant Stadium on March 28, 2008 in Houston, Texas. (Photo by Ronald Martinez/Getty Images)
Virginia joined Florida, Wichita State and Arizona as a No. 1 seed Sunday when the selection committee announced the pairings for the NCAA tournament.
The Cavaliers, widely considered a 2 or 3 seed in many mock-ups of the bracket, instead vaulted to the top of the East region. They won the ACC regular-season and tournament titles.
March Madness begins Tuesday with a pair of "First Four" games in Dayton, Ohio.
The Gators bring a 26-game winning streak into the tournament. They are seeded first in the South and are the No. 1 seed overall.
Wichita State, the top seed in the Midwest, comes in at 34-0 -- the first team to enter the tournament undefeated since UNLV in 1991.
The Final Four starts April 5 in Arlington, Texas.