Bay Area juniors upset top seeds in national tourneys

   Two juniors from the San Francisco Bay Area knocked off No. 1 seeds in the semifinals of national junior tournaments in Northern California on Sunday.
   In the USTA National Open girls 16s at the Laguna Creek Racquet Club in Elk Grove, third-seeded Sarah Hu of Oakland took out Nadia Gizdova of Columbia, Md., 6-3, 6-2.
   In the USTA National Open boys 14s at the Harbor Bay Club in Alameda, third-seeded Sean Hill of Berkeley knocked off Alexandre Rotsaert of Villanova, Pa., 7-5, 6-1.
   Hu will play second-seeded Claire Liu of Thousand Oaks for the title today at 10 a.m. Liu beat fourth-seeded Alaina Miller of Saratoga 6-3, 6-4.
   Hill will meet second-seeded Alafia Ayeni of San Diego in today's final at 10:45 a.m. Ayeni advanced with a 6-2, 7-6, 7-6 (3) victory over unseeded Stefano Tsorotiotis of Libertyville, Ill.
   In the boys 16s in Elk Grove, third-seeded Cameron Klinger of San Jose will face unseeded Lane Leschly of Atherton for the title today at 10 a.m.
   Klinger topped unseeded Conrad Russell of Palo Alto 7-6 (4), 4-2, retired, and Leschly edged fifth-seeded Jonathan Li of Cupertino 6-7 (5), 6-4, 7-6 (6).
   National 30 Indoors in Gold River -- Top seeds and defending champions Romana Tedjakusuma of Tracy and Calle Hansen of Newbury Park will defend their singles titles today at the Spare Time Indoor Tennis Center.
   Tedjakusuma will take on unseeded Francesca LaO of Bellevue, Wash., at 9 a.m., and Hansen will go against second-seeded Jan Tiilikainen of Reno at 11 a.m.