A. Zamarripa, Quan stay hot in Winter Nationals

   Allura Zamarripa of Saint Helena in the Napa area and Rudy Quan of Roseville in the Sacramento region continued their remarkable runs in the USTA National Winter Championships today.
   Zamarripa upset a seed for the fourth time to reach the girls 16 semifinals in Orlando, Fla. Quan, seeded seventh in the boys 12s, throttled top-seeded Nicholas Mangiapane of Davidson, N.C., 6-0, 6-1 in the quarterfinals in Tucson, Ariz. Quan has lost only seven games in his five matches.
   Zamarripa ousted No. 11 Carmen Corley of Albuquerque, N.M., 6-4, 6-2 in the hard-court tournament. Zamarripa also knocked off No. 4 Anessa Lee of San Marino in the Los Angeles region in the first round, No. 17 Allison Zipoli of Winnetka, Ill., in the third round and No. 13 Katja Wiersholm of Kirkland, Wash., in the fourth round.
   Zamarripa will take on No. 1 Gianna Pielet of El Paso, Texas. Pielet held off No. 10 Rosie Garcia Gross of New York 6-4, 5-7, 6-4 after edging Leyden Games of Newport Beach 2-6, 6-2, 7-6 (4) in the fourth round.
   Fourth-seeded Allura and Maribella Zamarripa lost to top-seeded Corley and Pielet 6-3, 6-4 in the doubles semis.
   Meanwhile, No. 7 Priya Nelson of Sacramento and No. 10 Anushka Khune of Palo Alto advanced to the girls 14 semis in Tucson, but No. 14 Tomi Main of Seaside in the Monterey area lost.
   Nelson beat No. 17 Nevena Carton of Middletown, N.J., 7-5, 6-2, and Khune outclassed Emma Baker of Chicago 6-2, 6-3. Khune has not lost a set in her five matches.
   Midori Castillo, from the San Diego suburb of Bonita, dominated Main 6-1, 6-3 to prevent an all-Northern California matchup against Khune.
   In the boys 14 quarterfinals in Tucson, No. 3 Samir Banerjee of Basking Ridge, N.J., downed No. 14 Brian Chong of Cupertino (near San Jose) 6-3, 7-5.