Duke coach Krzyzewski undergoes knee replacement surgery Posted Aug 14, 2017 Duke basketball coach Mike Krzyzewski has undergone knee replacement surgery. Team spokesman Cory Walton says the procedure on his right knee was performed Sunday by Dr. Michael Bolognesi at the university's hospital. Bolognesi says the surgery went "very smoothly," and doctors hoped to have the Hall of Fame coach walking later in the day. (Associated Press)