EUGENE — So often this season, Oregon would figuratively kick opponents in the backside. On Sunday, Sabrina Ionescu and the Ducks did it literally.

Ruthy Hebard scored 24 points, Satou Sabally had 20 points and Ionescu had 13 points and 11 assists for No. 3 Oregon in a 92-56 demolition of Washington in the regular season finale at a sold out Matthew Knight Arena.

Oregon (28-2, 17-1 Pac-12) opened with the first seven and though Washington reeled off 10 straight to take a brief lead later in the first quarter, the outcome was never in question between the three-time Pac-12 regular season champions and three-year running cellar dwellers.

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The first quarter closed with Ionescu getting fouled by UW’s Amber Melgoza with 3.4 seconds and the Ducks guard delivering the Huskies’ leading scorer a kick to the posterior, which officials reviewed and assessed an intentional foul to Ionescu.

The game, and the battle of the rival senior guards, was not competitive from that point on.

Sabally scored 13 amid a 27-6 second quarter to make it 46-24 at the break.

“When we’re challenged a little bit, and we were challenged in that first half – we knew this was going to be a tough game so this was not one that we were overlooking," Oregon coach Kelly Graves said. "They just came out and played harder than us that first quarter. I think we were challenged and they answered the challenge. I think they decided this is enough.”

The onslaught continued in the third, with Hebard scoring 11 points and Oregon closing on a 12-2 run.

Mai-Loni Henson and Alexis Griggsby each scored 11 points and Melgoza, who came in entering 17 points, had 10 on just 3 of 13 shooting from the field for Washington (13-16, 5-13 Pac-12).

Taylor Chavez had 14 points and Minyon Moore added 11 for Oregon, which enters the Pac-12 Tournament riding a 16-game win streak and a new program record with 17 conference wins.

The emergence of Chavez, who missed the postseason last year due to a foot stress fracture, and the additions of several freshmen off the bench has given Oregon more depth compared to a year ago for what it hopes full be a deeper NCAA Tournament run.

“You can’t win this whole thing with just five players,” Sabally said. “We know that we rely on our bench players so much and they give us everything and they contribute every game. So we’re not beat up we can go and practice with full energy and full power. We couldn’t do that last year. We’re really fortunate this year everyone is healthy and we’re just really going full head of steam into postseason.”

Oregon will face the winner of No. 8 seed Utah and No. 9 seed Washington in the Pac-12 Tournament quarterfinals at 2 p.m. PT Friday at the Mandalay Events Center in Las Vegas.

“We’re definitely the riding the crest of a big wave, playing well," Graves said. "I think once we got focused after that Arizona State game and really had a chance to kind of reflect on who we are and where we want to go I think they played with an entirely new commit.

"We’re playing well. We’re healthy. We’re happy. We’re hungry still. I look at where we were at this point last year, just limping home so to speak. An entirely different perspective and feeling about this group.”