Zion Williamson is "getting better," but he won't be on the court for No. 3 Duke's game at Virginia Tech on Tuesday, coach Mike Krzyzewski said.

It will be Williamson's second missed game since suffering a Grade 1 sprain of his right knee early in a loss against North Carolina last week. Krzyzewski said Williamson, the projected No. 1 overall NBA draft pick, is making progress on a four-step recovery schedule that the school uses for knee injuries, but they're being cautious not to put a timetable on his return.

"He's going through that, and when he gets through all of them, we'll see where he's at," Krzyzewski said. "There's no timetable. We don't want to put the pressure of time on him."

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Krzyzewski acknowledged that Williamson's injury has forced the spotlight onto the NBA's current "one-and-done" rule that forces players to spend at least a year out of high school before entering the draft. And while he's chagrined that it's his player who's the focus of the discussion, Krzyzewski said he feels the debate is warranted.

"Zion is a player that attracts attention," Krzyzewski said. "It's interesting how every issue in college basketball -- amateurism, paying, going early -- are all brought in at this point. I do think in some ways it's good. They have a face to talk about, not just the injury.

"All those things should be talked about; it's just they're talking about him. And I think they should be discussed and remedied, but the main thing we're talking about is getting him healthy."

For his part, Williamson has suggested all season that playing one year at Duke was a priority for him.