At 6' 3", Duval is considered the top point guard in the class and a top five player overall.
He's the second player to commit to Duke following the announced departure of Frank Jackson. Jordan Tucker (ESPN No. 40) committed over the weekend.
RELATED: ESPN 100 senior Jordan Tucker announces commitment to Blue Devils
In the video Duval says ""I'm excited to evolve as a student, as a basketball player and now, and forever, as a Blue Devil."
Meanwhile Duke fans everywhere exclaimed "WHOOO-HOOO!", or something to that effect.
Jackson's jump left a major void at the point.
Monday's announcement shores up a roster turnover that is unprecedented. Four guys (including three freshman) are leaving Duke early for the NBA.
RELATED: Frank Jackson will sign with agent, remain in NBA draft
Duke now owns a strong class that includes Wendell Carter, (No. 4) and Gary Trent Jr. (No. 7), Alex O'Connell (No. 84), Jordan Goldwire (3-star guard) and Tucker (No. 40).