Blackman made its free throws down the stretch to nip visiting Columbia 59-56 Tuesday night.
The Lady Blaze (5-0) scored their final six points from the foul line and held on for the win.
The Lady Lions (4-2) never led in the fourth quarter, but had a chance to tie it at 57 with three seconds remaining. Keiana Gilbert, who had 13 second half points, saw her tying free throw spin out. Blackman's Alex Johnson was fouled on the rebound and made two free throws for the final margin.
"We kept our poise," Blackman coach Chad Hibdon said. "We settled down after every bad play we made. If you can stay calm when you're not making the plays, you can win the close ones."
The Gilbert sisters, Aryanna and Keiana, led a third-quarter comeback for the Lady Lions, scoring all 16 of their team's points in the quarter.
"They're good," Columbia first-year coach Arnett Bodenhamer said. "We kept feeding them the ball and they kept scoring."
The sisters, who transferred from Lawrence County this year, each made a steal and driving basket to give Columbia a four point lead late in the quarter. It was Columbia's largest, and last, lead of the game.
Aryanna Gilbert led all Columbia scorers with 20 points, while younger sister Keiana had 16. Makayla Timmons scored the Lady Lion's first eleven points of the game and finished with 13.
Blackman, fresh off a Saturday win against nationally-ranked Bolingbrook (Ill.), took the lead for good at 44-43 on a three-pointer by Micah Norris, who led the Lady Blaze with 15 points. Crystal Dangerfield also scored 15. Johnson contributed 11 and Jazz Bond had 10.
"We just couldn't stretch the lead," Hibdon said. "The Gilberts are very aggressive on the offensive boards, and they kept getting put-backs to keep it close. They crash the boards as well as anybody we've seen this year."
Blackman 59, Columbia 56
Columbia 16 11 16 13 -- 56
Blackman 17 14 13 15 -- 59
Columbia: A.Gilbert 20, K.Gilbert 14, M.Timmons 13, B.Frierson 6, C.Young 2, R. Lockridge 1
Blackman: M.Norris 15, C.Dangerfield 15, A.Johnson 11, J.Bond 10, A.Pollock 5, A.Allen 3