Duke came back down to earth a bit on Sunday.

After looking utterly unbeatable through two preseason games against Belmont and Tennessee, the Blue Devils were tested against No. 17 Kansas in an exhibition game on Sunday at Allen Fieldhouse. Duke played a fantastic second half to win 90-83. Here are a few quick observations.

Joaquim Boumtje Boumtje's Defensive Versatility

Duke Blue Devils center Joaquim Boumtje Boumtje (30) reacts after making a three against Kansas Jayhawks during the exhibition game inside Allen Fieldhouse in Lawrence, Kansas on Oct. 25, 2026. | USA TODAY Network via Reuters Connect

Duke freshman Joaquim Boumtje Boumtje was tested on the offensive end much more than he has been in either of the Blue Devils' first two preseason contests. Kansas was physical and did a good job forcing the seven-footer to take difficult shots.…