Cambridge Christian's' man-to-man defense stifled Academy at the Lakes' offense to claim the Class 2A, District 8 championship 43-34 on Saturday night.
The Lancers (21-4) took an early lead in a game that was tight most of the night. Cambridge held the host Wildcats (15-9) to 22 points below AATL's season average.
"We had trouble cracking their defense," Wildcats coach Tom Haslam said.
AATL missed a handful of layups and scored only three points in the first quarter but hung around until the final two minutes. Cambridge hurt its cause by missing 17-of-20 free throws.
Robbie Robertson led Cambridge Christian with 11 points, and Curtis Walls scored eight.
Ethan Haslam and Abaz Igwe each scored 10 points for the Wildcats.
Both teams advance to Thursday's region quarterfinals.