VIDEO: Grayson Allen follows missed 3-pointer with huge slam

Never give up on a play. 

That's a lesson preached by coaches time and time again, but Duke guard Grayson Allen took the message to heart during Saturday's Final Four matchup with Michigan State.

Allen missed a 3-point attempt a little over five minutes into the second half, but followed it up with a ferocious, uncontested one-handed slam.

The slam pushed Duke's lead over the Spartans to 19 points, and barring a miraculous comeback from Michigan State, the Blue Devils will move on to the national championship game.