Xavier squarely on the bubble

Tu Holloway and Xavier know they are right on the cusp of the NCAA bubble. Frank Victores/US Presswire

Welcome back to the expanded edition of Joe Lunardi's Rundown. With the start of January, this series now features tournament odds, an element that will take you deeper into Bracketology. Bracketology provides a snapshot of how the bracket looks on a specific day, but, through the use of Lunardi's extensive database of previous seasons, tournament odds tell you how the bracket is likely to look come Selection Sunday.

Top line report

There is no change on the top line this week. The most significant development is the decrease in odds ("Field" from 35 percent to 20 percent) that a team not on the list will emerge as a No. 1 seed contender. In other words, the four teams announced first on Selection Sunday are now almost certainly coming from the group in the box.