Duke phenom Cooper Flagg has taken college basketball by storm, and now he's earned a bold declaration from legendary coach Mike Krzyzewski, who just called him "the best player in the country.

After a summer that saw him scrimmage against—and wow—some of the best basketball players in the world, Cooper Flagg is now impressing against some of the best college players in the nation as a freshman for Duke.

Duke basketball has its longest winning streak since 2015. Here's what Cooper Flagg and the Blue Devils did at Boston College.