Blake Tomosieski scored both goals for Warren Hills as it handed North Warren its first loss, 2-0, in Blairstown.
Tomosieski gave Warren Hills (3-5) a 1-0 lead in the first half before adding another goal in the second.
Martin Gomez-Cabrera and Andrew Szamreta had an assist.
Jose Garcia made nine saves to preserve the shutout.
Jerson Soto recorded 11 saves for North Warren (5-1-1).