Davidson (3-0) will take on No. 23 Purdue in Friday’s semifinals. The Shockers play Appalachian State.
Markis McDuffie had 18 points to lead the Shockers, who held a 10-point lead early in the second half.
The loss spoiled the return to the College of Charleston campus of Wichita State coach Gregg Marshall. Marshall was a former assistant who accepted the Cougars head coaching job in 2007 before returning to his old job at Winthrop a day later.