Senior outside hitter Sara Shaw racked up 10 kills as the Women of Troy bounced back.
USC will face off against No. 2 Stanford, a team it defeated twice last season.
The USC women’s tennis team started 2013 by taking all seven matches against UC Irvine.
Despite the loss of veteran Alison Ramos, the Trojans are ranked No. 4 overall.
USC knocked off No. 1 UC Irvine in straight sets Friday night at the Galen Center.
The MPSF semifinals will feature the top-two teams in the entire country.
Freshman catcher Garrett Stubbs had two runs batted in as USC rallied from a 2-0 first inning deficit on the road.
Hindered by a slow start, the Trojans fall to No. 2 UC Irvine but sweep UC San Diego.
USC upends UC Irvine at home one week removed from an 11-4 victory over the Anteaters.
Trojans struggle offensively, and are shut out for the second time in their last three games.