Tyrese Proctor led Duke (4-2) with 15 points, Flagg scored 13, Kon Knueppel had 11 and Sion James finished with 10. Mayo put Kansas ahead for good when he made a jumper with 1:57 left for a 73-71 lead. Flagg hit a free throw for Duke and Rylan Griffen answered with two foul shots with 2 seconds left.

Flagg has been tested during the first weeks of his college career, and the 17-year-old phenom still looks like the No. 1 pick in the 2025 NBA draft.

Flagg and Duke had their toughest test yet Tuesday night against No. 1 ranked Kansas, where they came up just short and fell 75-72. Flagg had 13 points, five rebounds and three assists, but his highlight of the night was a massive slam dunk over Kansas' Flory Bidunga.

On that play, Flagg drove to the basket on big man Hunter Dickinson. Adams arrived to help and swatted Flagg’s shot. He tried to recover the ball but knocked it out of bounds. On the next Duke possession, Adams stopped a three-on-one fast break by swatting Kon Knueppel’s shot at the rim.

Kansas basketball head coach Bill Self had high praise for Duke’s freshman phenom Cooper Flagg ahead of Tuesday’s clash between the No. 1 Jayhawks and No. 11 Blue Devils in Las Vegas. Speaking about Flagg’s impact and skill set on Monday,

The tone of the game changed when Dickinson kicked Duke's Maliq Brown in the head after they fell to the floor during a fight for a rebound. But Kansas hung on for the win.

Cooper Flagg set out to lead Duke basketball to a big win vs. No. 1 Kansas, but he could not quite pull it off

Cooper Flagg may be the top player in the country, but Kansas is the top-ranked team. And the Jayhawks proved why Tuesday. No. 1 Kansas defeated Flagg and