Las Vegas sports book Bovada updated its odds to win the 2015-16 NCAA men's basketball championship, and four teams are tied at the top with 10/1 odds.

Defending national champion Duke, Kentucky, Michigan State and North Carolina are the four co-favorites. North Carolina was the previous favorite at 6/1, followed by Kentucky, Virginia and Maryland.

Duke has added to its recruiting class in recent weeks, landing five-stars Brandon Ingram and Derryck Thornton in the last 10 days. Kentucky has missed on a few targets recently, including Cheick Diallo choosing Kansas over the Wildcats on Tuesday afternoon.

Below are the newest odds from Bovada.

Duke - 10/1

Kentucky - 10/1

Michigan State - 10/1

North Carolina - 10/1

Maryland - 14/1

Kansas - 16/1

Iowa State - 18/1

Virginia - 18/1

Arizona - 20/1

Gonzaga - 20/1

Villanova - 22/1

Indiana - 25/1

Oklahoma - 28/1

Louisville - 33/1

Michigan - 33/1

Wichita State - 33/1

Notre Dame - 40/1

Texas - 40/1

Texas A&M - 40/1

Utah - 40/1

Wisconsin - 40/1