The K-State volleyball team has lost just three matches this season, but coach Suzie Fritz is still not satisfied.

Fritz said she felt her team was outworked defensively against Oklahoma and Colorado and called on her senior liberos, Lauren Rosenthal and Angie Lastra, to step up.

"We've been all over them about just making greater effort, just greater exceptional effort for plays," Fritz said.

"I felt like Oklahoma made greater effort defensively. I felt like Colorado made greater effort. So we've kind of gone back to the drawing board with that and have tried to emphasize that a bit more with our team."

K-State's defense will have another chance to improve when the No. 18 Wildcats (12-3, 4-1 Big 12 Conference) challenge Texas A&M (12-3, 2-3) at 6:30 tonight at the Ferrell Center in College Station, Texas.

Lastra, who leads the team with 221 digs, said the Wildcats showed improvement in Wednesday's 3-0 sweep of Missouri.

"We're going for every ball," Lastra said. "In fact, I think we're battling for every touch."

Offensively, K-State didn't have much trouble against the Tigers. Junior outside hitter Rita Liliom led the team with 15 kills and four service aces.

Fritz said she'll continue coaching an aggressive service game as Big 12 play continues.

"If we're going to make errors, we're going to make them going for it," Fritz said. "We have to play that way. It's the only way over time you can be successful in the league."

Texas A&M did not lose a match during the preseason, but Big 12 Conference play has been tougher for the Aggies. They picked up their first Big 12 road win Wednesday, sweeping Baylor 30-27, 30-24 and 30-24.

Jillian Phillips led Texas A&M with 11 kills on 42 percent hitting.

Four players on the Aggies' roster have recorded more than 100 kills this season, and Phillips has tallied 97.