(Undated) -- The road to the Elite Eight and eventually, the Final Four starts Thursday as the Sweet 16 gets underway in the NCAA Tournament. Plenty of great action is on tap Thursday, as second-seed Duke battles three-seed Texas Tech and one-seed Gonzaga faces four-seed Arkansas among other highlights. On Friday, the 15-seed darlings Saint Peter's will look to keep chasing the dream as they face three-seed Purdue. Among other action on Friday, four-seed UCLA will battle eight-seed North Carolina.