By David Droschak
The Associated Press

DURHAM, N.C. - Mike Krzyzewski strained a hip flexor muscle when he jumped off the bench during an exhibition game and will be on crutches over the weekend.

However, the injury doesn't appear to be serious or related to Krzyzewski's most recent hip replacement surgery, said Jon Jackson, the school's sports information director.

The injured hip flexor muscle is not connected to Krzyzewski's new right hip, which he had replaced three days after the Blue Devils were eliminated from the NCAA tournament in late March, Jackson said.

The 55-year-old Krzyzewski was expected to be released from the hospital later Friday and could be back at practice Monday.

Krzyzewski, who has 637 career wins and three national titles, missed Duke's final 19 games of the 1994-95 season after undergoing a left hip replacement operation.

The Hall of Fame coach didn't return for the second half of his team's 102-74 victory Thursday night over EA Sports. He had an MRI on his right hip and leg and was admitted to Duke Medical Center for observation.

Krzyzewski was feeling good enough to ask for a final box score to be faxed to the hospital so he could review it.

"It doesn't matter how much pain he's in, his main focus is worrying about his team," point guard Chris Duhon said. "That's why we love him so much. He's only concerned about us and not himself."

The No. 6 Blue Devils lifted weights Friday and have the weekend off before resuming practice next week for their season opener against Army on Nov. 23.

"His recovery is expected to take seven-to-10 days, but no surgery will be required," said Dr. Claude Moorman, director of the Duke Sports Medicine Center and the team's head physician.