Men's college basketball Power Rankings: The 4-team race for No. 1 - ESPN

Four teams had a legitimate case to be No. 1 in this week's Power Rankings.

Michigan took the top spot in last week's edition thanks to the Wolverines' overwhelming dominance at the Players Era Festival in Las Vegas, and Dusty May's team hasn't slowed since, winning two more games by a combined 69 points.

Arizona was our No. 1 team heading into Feast Week after the Wildcats went into Storrs and knocked off UConn in a true road game. At the time, they had the best résumé in the country featuring quality wins over UConn, Florida and UCLA. They've since added a win over Auburn.

Duke now has the best collection of wins of any unbeaten team with victories over Michigan State, Arkansas, Kansas, Florida and Texas — only one of which came at Cameron Indoor Stadium. The Blue Devils are No. 1 in wins above bubble and ESPN's Strength of Record.

And finally, there's Iowa State, which landed potentially the most impressive win we'll see from any team this season, going to Purdue and knocking off the then-AP No. 1 Boilermakers by an astonishing 23 points. A win like that automatically gets the Cyclones into the mix.

We opted to keep Michigan on top given the strength of its dominance over the past few weeks. It doesn't look like there's a team in the country that could beat the Wolverines with the way they are playing.

Previous ranking: 1

Michigan is on a run rarely seen in college basketball. The Wolverines rattled off four straight wins by at least 30 points, culminating in Saturday's 101-60 victory over Rutgers. They also became only the third Division I team in the past 25 seasons to win six straight games by at least 25 points with Tuesday's 89-61 win against Villanova, per ESPN Research, joining the 2018-19 Gonzaga and 2006-07