Duke added another five-star prospect from the class of 2020, as forward Jalen Johnson committed to the Blue Devils on Thursday.

Johnson announced the news on Twitter in a highlight video.

A five-star prospect from Milwaukee who attends Nicolet High School in Glendale, Wis., Johnson is rated fourth in the class nationally by the 247Sports Composite rankings. He was also considering Wisconsin, Arizona and Kentucky.

Johnson averaged 19.9 points per game last season after transferring from nearby Sun Prairie High School.

Duke had already drawn a commitment from five-star point guard Jeremy Roach, who is ranked 18th on 247Sports' list. Roach and Johnson are the only two players in the top 20 who have committed.

--Field Level Media

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