Second-ranked Blackman flexed its defensive muscle Friday night.
And third-ranked Oakland had no answer.
The Lady Blaze held Oakland without a field goal in the first quarter and just one in the fourth to remain unbeaten with a 46-28 win in a matchup of top Class AAA teams.
"I think that's been our M.O. for a long time," Blackman coach Chad Hibdon said of his team's defensive effort. "There are a lot of times when things aren't going to go well offensively. You can get down and guard people and be relentless."
Tennessee coach Holly Warlick attended the game. Hibdon said she was there to watch Blackman freshmen Crystal Dangerfield and Jazz Bond.
Dangerfield led Blackman (18-0, 3-0 7-AAA) with 17 points, Micah Norris added 10 and Bond had eight.
Emily Eubank led Oakland with seven and was in foul trouble throughout the game.
Oakland (15-2, 1-2) struggled from the field in the first half, shooting 20 percent, including 0-for-10 in the first quarter.
Oakland finished the game 24 percent from the field
"We didn't shoot the ball well, not at all," Oakland girls coach Jennifer Grandstaff said. "I think that was the name of the game.
"We had some open looks, but couldn't knock them down. It's hard to get second chances against them."
Oakland's first-half offensive struggles coincided with Eubank's foul woes. The junior picked up her second foul at the 4:30 mark of the first quarter, sending her to the bench. She played minimal minutes in the second quarter, but did score the final four points of the half to halt Blackman's 11-0 run and cut it to 19-12 at halftime.
"If she is going, and playing well, then we have a good rhythm," Grandstaff said. "When she is on the bench, we struggle."
Oakland scored the first eight points of the third quarter to take a 20-19 lead before Dangerfield hit a jumper.
Blackman pushed the lead to 28-23 on Norris' layup with 46 seconds left in the third quarter.
"We just have to keep our defense perfect, and not let them score," Norris said. "We just have to play our best."