Three players quit matches in Tiburon

   There were more retirements in Tiburon on Tuesday than in Brett Favre's recent past.
   Three players quit, all against seeds, in the first round of the $100,000 First Republic Bank Tiburon Challenger at the Tiburon Peninsula Club.
   Most notably, Denis Gremelmayr of Germany retired because of dizziness while leading second-seeded Ivo Karlovic of Croatia 7-6 (4), 1-2. The 6-foot-10 Karlovic won last week's Sacramento Challenger.
   Thiemo de Bakker of the Netherlands strained his groin while trailing seventh-seeded Wayne Odesnik 6-1. Finally, Denis Kudla, a 19-year-old wild card from Arlington, Va., sprained his ankle against fifth-seeded Vasek Pospisil of Canada while behind 7-5, 2-0.
   The only other seed in action, No. 4 Bobby Reynolds of Acworth, Ga., actually had to play two sets to advance. A quarterfinalist in Sacramento last week, Reynolds dispatched Raven Klaasen of South Africa 6-4, 6-3.
  Former doubles stars Ken Flach, 48, of Mill Valley and Rick Leach, 46, of Laguna Beach lost to Las Vegas residents Brian Battistone and Chris Wettengel 6-4, 6-2 in the first round. Leach won five Grand Slam men's doubles titles and Flach four. They teamed to win the 1993 U.S. Open crown.
   ATP World Tour in Shanghai -- Folsom resident Dmitry Tursunov and Tommy Robredo of Spain defeated Chinese wild cards Gong Mao-Xin and Li Zhe 7-6 (5), 7-6 (5) in the first round of doubles at the $3.24 million Shanghai Rolex Masters.
   Former Stanford All-American Scott Lipsky and Kevin Anderson of South Africa lost to Nicolas Almagro of Spain and Bruno Soares of Brazil 6-2, 6-3.   

 $100,000 FIRST REPUBLIC BANK TIBURON CHALLENGER

At Tiburon Peninsula Club

Final-round singles qualifying

   Artem Sitak (8), New Zealand, def. Luka Gregorc, Slovenia, 6-3, 6-4. Alex Bogdanovic (6), Great Britain, def. Tim Smyczek (2), Milwaukee, Wis., 7-5, 6-4. Alejandro Gonzalez (3), Colombia, def. Dimitar Kutrovsky, Bulgaria, 6-3, 6-4. Pierre-Ludovic Duclos (4), Canada, def. Greg Ouellette, Ormand Beach, Fla., 4-6, 7-6 (7), 6-3.

First-round singles

    Laurynas Grigelis, Lithuania, def. Frederik Nielsen, Denmark, 6-3, 6-3. Bobby Reynolds (3), Acworth, Ga., def. Raven Klaasen, South Africa, 6-4, 6-3. Wayne Odesnik (7), Weston, Fla., def. Thiemo de Bakker, Netherlands, 6-1, 0-0, retired. Martin Fischer, Austria, def. Simon Greul, Germany, 6-3, 6-3. Robert Farah, Colombia, def. Daniel Kosakowski, Downey, 6-4, 4-6, 7-6 (4). Vasek Pospisil (5), Canada, def. Denis Kudla, Arlington, Va., 7-5, 2-0, retired. Roman Borvanov, Moldova, def. Juan Sebastian Cabal, Colombia, 1-6, 6-4, 7-6 (6). Ivo Karlovic (2), Croatia, def. Denis Gremelmayr, Germany, 6-7 (4), 2-1.

First-round doubles

   Steve Johnson, Orange, and Sam Querrey, Las Vegas, def. Jordan Kerr, Australia, and David Martin (4), Huntington Beach, 6-1, 3-6, 10-8 tiebreak. Brian Battistone and Chris Wettengel, Las Vegas, def. Ken Flach and Rick Leach, 6-4, 6-2. Alex Kuznetsov, Tampa, Fla., and Ryan Sweeting, Fort Lauderdale, Fla., def. Sanchai Ratiwatana and Sonchat Ratiwatana, Thailand, 7-5, 6-1.