Tonight at 6:09 p.m. ET on TBS the West's top seed, the Wisconsin Badgers, will be back in the saddle after a grueling Sweet 16 clash against the UNC Tar Heels to take on the No. 2 seed Arizona Wildcats, who also had to stave off a frisky challenger in the sixth-seeded Xavier Musketeers. Live stream the game free by clicking this link. Badgers fans can find the radio broadcast on WIBA 1310, while Arizona fans may do likewise on 700 WLW.