Top-seeded Naty Alvarado of Hesperia and No. 2 Vern Roberts of Tucson advanced to today's semifinals of the United States Handball Assn. pro tour stop at the Los Caballeros Racquet and Sports Club at Fountain Valley.
Alvarado will play No. 4 John Sabo of Summit, N.J., and Roberts will play No. 5 Pancho Monreal of El Paso.
Friday, Alvarado defeated Tim Labey of St. Paul, 21-10, 21-16, and Roberts beat Dan Amijo, 12-21, 21-16, 11-0.