All four of college basketball's remaining unbeatens -- Duke, Arizona, Michigan and Wyoming -- lost in the last week. Among the 13 one-loss teams, who should be No. 1?

5. Indiana (15-1) » There was no shame losing to giant-killing Butler. But after the Hoosiers started the year as No. 1 by a solid margin, center Cody Zeller has not lived up to his preseason hype.

4. Michigan (16-1) » Were it not for Trey Burke's 3-pointer that went in and out at Ohio State, the Wolverines would be undefeated and ranked No. 1. It's tough to penalize them for a loss to a rival in which they rallied from 21 points.

3. Kansas (14-1) » A case can be made for the Jayhawks, who have won 13 straight after a three-point loss to Michigan State. Seven-footer Jeff Withey might be the nation's defensive MVP, and explosive Ben McLemore could be the best freshman.

2. Louisville (15-1) » Few teams pass the eye test as convincingly as the big, fast, physical Cardinals, who have a brilliant backcourt with Peyton Siva and player of the year candidate Russ Smith. But it's tough to rank Louisville ahead of a Duke team it lost to in November.

1. Duke (15-1) » With Ryan Kelly injured and Rasheed Sulaimon shooting 0-for-10, the Blue Devils didn't look like a No. 1 in Saturday's loss at N.C. State. But they still have the best resume by far with wins over Kentucky, Minnesota, Louisville, VCU and Ohio State.

- Kevin Dunleavy