North Carolina Tar Heels senior point guard Joel Berry II broke his right hand last week by punching a door after losing a video game to teammate Theo Pinson and a manager.

"He did a silly thing," North Carolina coach Roy Williams told ESPN at ACC media day Wednesday. "That's what it was. One of his greatest characteristics is his competitiveness."

Williams told ESPN that he is uncertain how long Berry will be out, but the initial prognosis was approximately four weeks. The Tar Heels open the regular season on Nov. 10 in Chapel Hill against Northern Iowa.