Anthony Prak ran in for a touchdown midway through the second quarter, putting fourth-seeded Noble (7-2) ahead for good against fifth-seeded South Portland (4-5) in a Class B South quarterfinal at North Berwick.

The Knights will play at top-seeded Portland (9-0) in the semifinals next Friday.

After South Portland took a 7-0 lead in the first quarter, Noble came back with a safety before Prak’s winning touchdown. Neither team scored in the second half.