Red Boiling Springs, playing at home, beat Clay County 52-49 to advance in the Region 4-A tournament.
The Lady Bulldogs advance to a semifinal game and will play against the Clarkrange/Gordonsville winner Monday at 7:30 p.m. at Livingston Academy.
Macon County, playing at home, beat Hume Fogg 52-50 in the Region 5-AA tournament.
The Tigerettes advance to a semifinal game and will play against the East Literature/Goodpasture winner Monday at 6 p.m. at East Literature Magnet School.
Winners of Monday night's games are guaranteed to play at least two more games -- the region final and, win or lose, a sectional game with a spots in the state tournament at stake.