UCLA will be seeded 4th at the first-ever NCAA Beach VB Championship.
The 4th-ranked Bruins fell to 6th-ranked Arizona and were eliminated.
The fourth-ranked Bruins claimed their first-ever points off USC.
UCLA and USC advance to Sunday's winner's bracket semifinal (9 a.m.).
Second-seeded UCLA won its first Pac-12 Tournament dual on Friday.
Megan and Nicole McNamara fell to the Witt twins from Arizona.
Nicole & Megan McNamara beat Ivey Schmitt & Kamila Tan, 21-15, 21-18.
UCLA will be seeded second and the McNamara twins are No. 3 in Pac-12.
The Bruins conclude the regular season with their 10th-straight win.
The fourth-ranked Bruins defeated Loyola Marymount, 4-1.
UCLA to face Loyola Marymount & CSUN on April 20 in Northridge, Calif.
The Bruins won their eighth consecutive match on Senior Day at UCLA.