OKLAHOMA CITY — Jessica Clements hit a two-run walk-off home run with two outs to lead UCLA past Oregon 4-2 on late Thursday night in a Women’s College World Series opener.

Clements’ blast lifted ninth-seeded UCLA (55-11) into a matchup with No. 12 Texas Tech today at 4 p.m. (ESPN) for a spot in the semifinals.

The game started 75 minutes late because storms in the area delayed the previous game.

Oregon’s Kedre Luschar hit a single that scored Kaylynn Jones in the third inning to put the Ducks up 1-0.

UCLA’s Alexis Ramirez cranked a two-run home run in the fourth — just her fifth homer of the season — to put the Bruins up 2-1.

In the seventh, with UCLA still leading 2-1, the Bruins appeared to have the second out when Oregon’s Paige Sinicki was called out on a play at the plate. The call was overturned because of obstruction by Ramirez, and the run tied the score at 2.