The top seeds are Gonzaga, Illinois, Michigan and Baylor. Gonzaga has no losses, Baylor only two. They were supposed to play each other on December 5th, but the game was called because of COVID problems. Gonzaga’s 26-0 record is impressive, but their last 19 wins have come against unranked opponents.
Those four #1 seeds are the four highest-ranked teams in the polls as well as in Sagarin’s computer rankings.