A tough task of going up against No. 15 Oklahoma on Monday became even tougher after KU senior Courtney Steinbock went down with a rolled ankle in a 5-2 victory over Iowa State on Saturday.

Steinbock was walking with crutches Monday, but her twin sister, Kristen, thinks the Jayhawks have been using too many excuses as crutches for their performances against tough opponents such as the Sooners.

Oklahoma rolled over Kansas at Robinson Courts, 6-1.

“When you play a higher ranked opponent like Oklahoma, I think everyone’s saying that’s OK that we lose,” Kristen Steinbock said. “That attitude has to change. Some people got killed today.”

Kristen Steinbock had the only Jayhawk victory — a 6-3, 2-1 injury-withdraw decision over Irina Lykina.

“I knew everyone had to step up. It makes me want to play harder,” Kristen Steinbock said. “We knew we’d be playing higher up on the ladder.”

The Sooners (14-3 overall, 3-2 Big 12 Conference) won every other singles match and swept the doubles.

Kansas coach Amy Hall said the Jayhawks are struggling.

“I felt we competed,” Hall said. “Sets were close, and points were long, but we have a lot of work to get done. Some (players) do play scared. We need to overcome that. We need to overcome those factors and just compete.”

Kansas University's Kristen Steinbock returns a shot during her 8-5 doubles loss with Emily Haylock to Oklahoma's Heather Saluri and Anda Perianu. KU fell, 6-1, Monday at Robinson Courts.

Courtney Steinbock still is day-to-day, Hall said.

“She’ll be back, definitely,” Kristen Steinbock said. “It’s just a matter of when.”

Kansas (5-11, 3-3) did have its chances.

The top doubles team of Kristen Steinbock and Emily Haylock was up, 2-1, on the 13th-ranked duo of Anda Perianu and Heather Saluri before being beaten 8-5. Perianu, who beat Haylock, 7-5, 6-1, in singles, is rated sixth nationally in singles.

KU freshman Ashley Filberth and OU’s Joi-Lee Beachler gave students passing by quite a show in match that ultimately went to Beachler, 6-3, 7-5. The two battled for about 45 minutes after the other five single matches had concluded.

“We just need to have a good focus and stay positive because Baylor is not going to be a walkover,” Kristen Steinbock said. “Everyone’s got to be focused and not use excuses and just go out and play.”

Kansas will play host to Baylor on Saturday.