EUGENE — Sabrina Ionescu added to her NCAA record with her 15th career triple-double while Ruthy Hebard continued her domination of Washington State by scoring a career-high.

Ionescu had 17 points, 12 rebounds and 10 assists, six of them to Hebard, who scored a career-high 34 and had nine rebounds as No. 5 Oregon completed the sweep of its opening weekend of Pac-12 play with a wire-to-wire 98-58 dismantling of lowly Washington State Sunday afternoon at Matthew Knight Arena.

“I think after my game on Friday (4 of 12 field goals against Washington) I definitely wanted to come out and be a little better of a force,” Hebard said. “I’m happy I got great teammates to pick me up.”

Hebard made her presence felt early and often on Sunday, scoring 10 points in a 25-17 first quarter for Oregon and added nine more in a 24-12 second frame to give the Ducks a 20-point lead at the break while WSU went just 2 of 11 from the field during the second quarter.

The junior forward added 12 points in the third, including Oregon’s first 10 of the quarter, to hit a new career-high and added three more in the fourth.

Hebard, who averaged 27 points and 9.5 rebounds against WSU last season, went 16 of 21 from the floor but just 2 of 10 at the free throw line.

A 75.9 percent free throw shooter this season, Hebard wasn’t sure why she had such a poor day at the charity stripe but said she’d work on it.

Satou Sabally had 25 points and seven rebounds and Erin Boley added 12 points for Oregon (13-1, 2-0 Pac-12), which dominated the paint (62-40) and the glass (45-26) against the worst rebounding team in the Pac-12.

“We played a lot more like ourselves, I thought, this game (than Friday against Washington,” Oregon coach Kelly Graves said. “We were crisper, we were more aggressive. I think Ruthy tonight, she just had a matchup advantage and she took advantage of it. It was great to see her get back on stride. Satou continues to mature right before our eyes. It’s incredible. When she’s aggressive like that she just becomes so difficult.”

Ionescu (7 of 11 FG) tied Oregon’s career assists record (607), which was held by Lauri Landerholm since 1987, and became the 11th player in Pac-12 history with 600 career assists. Senior Maite Cazorla is nearing that milestone as well, with five assists giving her 598 in her career.

“I think it’s more cool that we’re going to be able to do that together, in the same season as well,” Ionescu said. “Props to my teammates though because they’re the ones that in the end have to make the baskets in order for us to get those assists. Our coaching staff puts us in good positions, me and Maite, to be able to make plays like that down the stretch of the game.”

Chanelle Molina had 14 points, six assists and five rebounds and Borislava Hristova scored 13 points for Washington State (6-8, 1-2 Pac-12), which entered the day with the worst scoring defense and field goal percentage defense in the Pac-12 and allowed its most points of the season.