Plainfield, No. 1 in the NJ.com Top 20, edged out a 64-61 win over Linden in Linden behind a buzzer-beating 3-pointer from Micah Gordon.
Linden's Asante Jones sank a free throw to tie the game at 61 in the waning seconds before Gordon hit the game-winner to go along with his 25 points.
Plainfield (5-0) also got strong contributions from Rashawn Williams, who scored 16 points to go along with a game-high 13 rebounds. Devin Thomas added 15 points.
Linden (4-2) kept it close throughout, led by Jekhi Burnam's team-high 16 points. Jayden Holman chipped in 13 points.
After a back-and-forth first half, Plainfield took a slim 29-28 lead into halftime. The teams played even in the third quarter, with each squad scoring 15 points.