River Valley 49, Viroqua 48
Kurt Schaller scored two of his 16 points on a tip-in with six seconds remaining to lift the host Blackhawks (5-16) over the Blackhawks (4-17).
River Valley trailed 12-4 to begin the game and was behind by nine at the end of the first half. Ryan Wickman led River Valley with 20 points.
Michael Lampman had 22 points for Viroqua.