Harrison Barnes 19 points in his NCAA debut on Thursday in North Carolina's 107-63 win against Hofstra.

Barnes scored all of his 19 points in the first half.

"His start was sensational for us. That was really the game," Williams said.

Barnes has embraced the lofty expectations.

"I wouldn't call it pressure, I call it having high expectations for myself," he said.

Quinn Cook of Mouth of Wilson (Va.) Oak Hill signed with Duke on Thursday.

Cook played at famed Hyattsville (Md.) DeMatha in 2009-10, but transferred to equally famous Oak Hill for his senior season.

"Quinn is a pass first point guard," said Oak Hill coach Steve Smith. "He can really shoot it and has very good three-point range. A lot of point guards who can shoot it, look for their shot all the time, but Quinn wants to get everyone involved in the offense."

Cook also considered signing with UCLA.

Cook will join Austin Rivers in Duke's 11-12 backcourt. Duke could also have Kyrie Irving if he doesn't leave for the NBA after his freshman season.