The Knights struck first as Krista Schmitt scored on an assist from Angie Guy 19 minutes in the match. The Go-Hawks responded just before halftime when Megan Englin knocked in Jenn Green's pass to tie the score.
Assumption scored the go-ahead goal in the first 10 minutes of the second half when Kristin Blough scored unassisted.
Assumption (16-2-1) dominated the game, outshooting Waverly-Shell Rock 10-1.
Davenport Assumption faces Cedar Rapids Xavier in the state semifinals at 4 p.m. Friday. Waverly-Shell Rock, making its first state tournament appearance, ends its season at 15-3-1.
Waverly-Shell Rock (15-3-1) 1 0 -- 1
Davenport Assumption (13-4) 1 1 -- 2
Goals
19:25 DA - Krista Schmitt (Angie Guy)
25:00 WSR - Megan Englin (Jenn Green)
50:00 DA - Kristin Blough