Top-ranked Duke went down early in the week. No. 2 Michigan and No. 4 Virginia, the last of Division I's unbeaten teams, both fell over the weekend. In all, six top-10 teams lost.
Tennessee kept rolling amid chaos across the AP Top 25.
The Vols are the new No. 1 in The Associated Press men's college basketball poll on Monday, climbing three spots to earn their first top ranking since the 2007-08 season.
Tennessee received 48 of 64 first-place votes from a media panel in the poll released Monday, well ahead of No. 2 Duke with 11.