Pac-12 Networks' Brian Hightower and Colin Hawley recap the first day of this year's PAC Rugby 7s tournament. The day was highlighted by Arizona's upset win over UCLA, handing the Bruins their first loss of the Fall. The Wildcats would top Pool B, setting up a cup semifinal match tomorrow against Utah. On the other side of the bracket, Cal went 3-0 on the day to top Pool A and set up the other semifinal against UCLA. Catch the rest of the tournament Sunday at 11 a.m. PT / 12 p.m. MT on Pac-12 Now.