TUCSON, AZ - Taylor McQuillin was one out away from her second one-hit shutout of a top-five team this season, before Sis Bates tied the game with a single in the bottom of the seventh, and Julia DePonte won the game with walkoff homer an inning later, leading top-ranked Washington over No. 9 Arizona in Game 1 of the Top-10 showdown in Seattle, 2-1 in eight innings.
In a game that featured 22 combined strikeouts to just five total hits, Washington's Taran Alvelo (14-1) outdueled McQuillin (16-2) in a matchup between two of the nation's top pitchers facing two of the nation's top offenses.
Alvelo allowed one run on two hits with 14 strikeouts for the Huskies (30-2, 2-2) while McQuillin allowed two runs on three hits with eight strikeouts.
Alyssa Palomino broke up Alvelo's no-hit bid with a one-out homer in the 6th.
The loss is the first of the conference season for UA (24-4, 3-1)
Arizona and Washington continue the series on Saturday at 3:30 p.m. MST for Game 2 on the PAC-12 Networks.