Syracuse and Marquette advanced to the round of 16 in the East Regional on Saturday. Four more schools played Sunday to determine which two teams would join them in Washington, D.C. on Thursday.
With the No. 1, 3, 4, 5, and 7 seeds having already lost, the West Region is wide open. Arizona and Wichita State have already advanced to the round of 16.
The South Region was the busiest segment of the NCAA tournament field on Sunday, with three games determining which teams advanced to Arlington, Tex. on Friday. Michigan had already advanced to the round of 16 on Saturday.