Ritchie had seven 3-pointers for top-seeded Green Bay (27-2). Lydia Bauer added 17 points, and Sarah Eichler had nine points and a team-high 11 assists. Breannah Ranger had nine points and a team-high eight rebounds.
The Phoenix led 37-22 at halftime and never trailed in the game.
Green Bay shot 48 percent from the field for the game. The Crusaders shot 33 percent. The Crusaders outrebounded Green Bay 37-35 but had 19 turnovers.
Tabitha Gerardot scored 21 points, grabbed 11 rebounds and was 10 of 10 at the free-throw line for eighth-seeded Valparaiso (11-20). Laura Richards had five assists.
Green Bay is unbeaten in Horizon League play. The Phoenix will play No. 4 seed Detroit on Friday.
RUTGERS: Decided against playing in the WNIT because of injuries.
Coach C. Vivian Stringer announced Wednesday that the Scarlet Knights would decline a bid to the WNIT if one is extended because injuries have limited several players.
Rutgers finished the season with a 16-14 record and struggled down the stretch. It finished with a 7-9 record in the Big East Conference and was eliminated in the second round of the tournament.
The bad finish almost virtually assured that Rutgers will miss the NCAA Tournament for the first time in 11 years and left the WNIT as the only option to continue playing until Stringer told tournament officials not to extend an offer.
SOUTHERN CALIFORNIA: Michael Cooper has quit after four seasons.
Athletic director Pat Haden said Cooper resigned Tuesday and a national search will be conducted for his replacement.
“USC women’s basketball has a storied heritage, with national championship teams and some of the best players in the history of the sport,” Haden said. “We believe we should be competing for Pac-12 championships and NCAA bids on a consistent basis.”
The Trojans went 11-20 this season and finished seventh in the Pac-12 with a 7-11 record. Cooper was 72-57 overall at USC, which has had eight coaching changes since 1976.
Haden says the women’s team should be competing for NCAA Tournament bids on a consistent basis.