Coach Mike Krzyzewski is out of the hospital after feeling light-headed after a loss at Wake Forest.
The school said in a statement Thursday that Krzyzewski was taken to Duke University Hospital in Durham for a precautionary examination after the 82-72 loss in Winston-Salem.
The school says his symptoms and condition have improved considerably and he was sent home early Thursday.
The 67-year-old Hall of Fame coach could be seen taking a knee during a timeout in the second half of the game on Wednesday night. He did not attend the postgame news conference.
Associate head coach Steve Wojciechowski said after the game that Krzyzewski had not been sick and has been in good physical shape.