How trends dictate Duke vs. UNC

In the rivalry, Roy Williams and Mike Krzyzewski haven't changed their styles much. Streeter Lecka/Getty Images

On Saturday night, Mike Krzyzewski and Roy Williams will meet for the 19th time as head coaches of Duke and North Carolina, respectively. Not surprisingly, the two experienced coaches have distinctive statistical track records that reflect their coaching philosophies. Those philosophies have influenced the way the previous 18 meetings have been played, and more than likely, how the 19th meeting will look as well.