Choy among five NorCal juniors in Winter Natl. semis

   Sara Choy of Palo Alto led a parade of five Northern California juniors into today's singles semifinals in the USTA National Winter Championships.
   Choy, the No. 7 seed in the girls 18s, routed No. 4 Elysia Bolton of Cold Spring Harbor, N.Y., 6-2, 6-0 on Saturday in Scottsdale, Ariz. Choy won the 16s last year.
   Joining Choy in the semis are No. 16 seed Jenson Brooksby of Carmichael in the boys 18s, unseeded Marcus McDaniel of Vacaville in the boys 16s, No. 2 Aryan Chaudhary of Santa Clara in the boys 14s and No. 1 Vivian Ovrootsky of San Jose in the girls 12s.
   Brooksby, the runner-up in the national 16 hard courts and clay courts this summer, demolished No. 8 Matthew Lord of Bloomfield, Conn., 6-1, 6-0 in Scottsdale.
   McDaniel outlasted unseeded Aditya Gupta of Irvine 7-4, 4-6, 6-2 in Scottsdale to set up a match against top-seeded Brandon Nakashima of San Diego.
   The matches of Chaudhary and Ovrootsky in Tucson, Ariz., were postponed by rain.
   Chaudhary defeated McDaniel to win the boys 14 title in the NorCal Junior Sectional Championships in Sacramento last June.
   In today's girls 18 doubles final, No. 3 seeds Carolyn Campana of Hillsborough and Ivana Corley of Albuquerque, N.M., will play No. 5 Jessica Aragon of Plano, Texas, and Emilee Duong of Placentia in the Los Angeles area.