Robinson and Westfield have clinched.
Oakton is in with either a win over Herndon or a loss by either Centreville or West Springfield.
Centreville can clinch the fourth spot with a victory over winless Chantilly and a West Springfield loss to undefeated Robinson.
If Centreville loses, West Springfield can clinch the fourth spot with a victory over Robinson.
If Centreville and West Springfield both lose, Herndon, Hayfield and Annandale are still mathematically alive.
Northwestern Region
Hylton, Stonewall Jackson, Woodbridge and George Washington-Danville have all clinched.
Hylton clinches top seed with a win over Forest Park. If Hylton loses, Stonewall Jackson clinches top seed with a win over Potomac (Va.).