The NCAA men's basketball tournament resumes tonight with the start of the Sweet 16. The East and West Region semifinals will be played in Boston and Phoenix, respectively. In the East, top-seeded Syracuse takes on fourth-seeded Wisconsin, followed by second-seeded Ohio State against sixth-seeded Cincinnati. In the West, top-seeded Michigan State goes up against fourth-seeded Louisville, and third-seeded Marquette faces seventh-seeded Florida. The Midwest and South Region semifinals are set for Friday. In St. Louis, top-seeded North Carolina will play 13th-seeded Ohio and second-seeded Kansas faces 11th-seeded North Carolina State. In Atlanta, third-seeded Baylor battles 10th-seeded Xavier and top-overall seed Kentucky plays fourth-seeded Indiana.