No. 4 East Central had a much tougher test than many expected on Thursday, as they battled No. 11 Del City until the final seconds.
The Lady Cardinals held on to advance, 54-50, behind a steal and layup by Ariel Williams with just 19 seconds to play.
That played capped a comeback by East Central that saw them erase an eight point fourth-quarter deficit.
The Cardinals will face No. 2 Edmond-Deer Creek at 10:30 AM Friday inside the Mabee Center. Deer Creek beat No. 9 Collinsville 42-40 to advance to the State Semifinals.