Oregon knocked off one of three undefeated teams in the country, holding off fourth-ranked Arizona 70-66 with a balanced scoring effort Thursday night in Eugene, Ore.
The Ducks (13-2, 2-0 Pac-12) won their 17th consecutive home game at Matthew Knight Arena.
E.J. Singler contributed 14 points, seven assists, seven rebounds and four steals to lead Oregon, which had four players score in double figures.
Top-ranked Duke and second-ranked Michigan are the last unbeaten teams in the country.
Arizona, which had won three consecutive down-to-the-wire games against San Diego State, Colorado and Utah, trailed by as many as 14 points in the second half. The Wildcats failed to make a serious run until the final two minutes.
Mark Lyons banked in an off-balance 3-pointer while unsuccessfully trying to draw a foul, cutting the lead to 67-63 with 1:18 left, capping an 11-2 run for Arizona (14-1, 2-1). After Singler made two free throws, Nick Johnson's 3-pointer made it a one-possession game.
The Wildcats got a chance to tie the game after Dominic Artis missed a 3-pointer, but Johnathan Loyd stole the ball from Johnson on the fast break and was fouled. Loyd made one of two free throws with 9.2 seconds left for a 70-66 Oregon lead.
Lyons led Arizona with 21 points. Solomon Hill added 16.
Arizona coach Sean Miller made a change in his starting lineup, putting in senior Kevin Parrom at small forward, with 6-foot-6 Hill moving to power forward, which he played all of last season. Parrom opened the scoring with a 3-pointer, and Hill followed with two consecutive 3-pointers as the Wildcats built an 11-0 lead.
The Ducks quickly responded in what turned out to be a fast-paced first half. Oregon went on a 16-2 run over about a 3 1/2-minute span, taking a 16-13 lead on Artis' fast-break layup.
The lead changed hands six times after that before the break, with the Ducks finishing the half on a 21-5 run.
Oregon took its biggest first-half lead at 41-28 when Singler bounced in a 15-footer with a minute to play. Arizona center Kaleb Tarczewski made a layup on the next possession to cut the halftime deficit to 41-30.
NOTES: Oregon coach Dana Altman has a 5-2 record against Miller. They first met when Altman was at Creighton and Miller was at Xavier. ... This was the only meeting of the season between the teams; they won't meet in Tucson, Ariz., in the Pac-12's unbalanced schedule. ... Fourth-ranked Arizona became the highest-ranked team to play in Matthew Knight Arena, which opened on Jan. 13, 2011. ... Parrom made his first start of the season and 14th of his career. He finished with seven points.