Jamon Hawkins sank three game-winning free throws with five seconds remaining against M.L. King to give the Rams a 68-67 win, their 16th of the season.
"It was a big win," Newton coach Rick Rasmussen said. "(M.L. King) came out lights out hitting 3's. They played extremely well."
The Rams improved to 7-1 in Region 2-AAAAA.
Newton's Derrick Henry finished with a game-high 22 points. Jared Mann and Hawkins added 15 points each.
Newton was 13 of 19 from the free-throw line compared to M.L. King's 3-for-3. The Rams committed just seven turnovers.
Rockdale 83, Loganville 78
The Bulldogs improved to 15-6 overall and 5-0 in subregion play behind the unforgettable performance by point guard Cordarryle Bethley, who scored 17 points and recorded a season-high 13 assists.
"Honestly, I think I found my leader on the team," Rockdale coach Alvin Williams.
Rockdale sophomore Kevin Ware added 15 points.
"I thought my young kids played really, really well tonight," Williams said. "Even though we got in some early foul trouble, we stepped up on the defensive end."
Mount Zion 44, Alcovy 42
Despite taking a 10-point lead into the final quarter, the Tigers were outscored 16-6 en route to the loss.
"We played uninspired basketball and played terrible down the stretch," Alcovy coach Eugene Brown said.
Loganville 69, Rockdale 39
The Lady Bulldogs dropped to 2-3 in subregion play after a 30-point loss.
"We just had turnovers at the wrong time," Rockdale coach Leonard Buckner said. "They annihilated us on the backboard."
Aselah Mazone registered eight points for Rockdale.