seeded Nikolay Davydenko of Russia opened the defense of his German Open title by beating Florent Serra of France 6-3, 6-1 Tuesday. Potito Starace of Italy outlasted Tommy Robredo of Spain 7-6 (10), 5-7, 6-1 to also reach the third round. Florian Mayer of Germany beat another seeded player, rallying to win 4-6, 7-6 (2), 6-3 against No. 15 Alexandr Dolgopolov of Ukraine. In other matches, Jarkko Nieminen of Finland ousted Gilles Simon of France 6-4, 3-6, 7-5, Maximo Gonzalez of Argentina defeated Albert Ramos-Vinolas of Spain 7-6 (5), 6-7 (3), 6-2 and Fabio Fognini of Italy beat Marc Gicquel of France 6-4, 6-4. Easy for Fish Sixth-seeded Mardy Fish of the United States beat James Ward of Great Britain 6-1, 6-2 Monday in the first round of the Atlanta Tennis Championships. No. 8 seed Benjamin Becker of Germany was beaten 6-3, 6-3 by Michael Russell, who at 32 is the oldest American ranked in the ATP top 100 world rankings. Fish earned his fourth career title – and his first on grass – July 10 at the Hall of Fame Tennis Championships in Newport, Rhode Island. In other singles matches, Rainer Schuettler of Germany beat Teimuraz Gabashvili of Russia 6-1, 6-4. Illya Marchenko of Ukraine defeated Belgium's Kristof Vliegen 6-4, 7-6 (4), and American Rajeev Ram held off Karol Beck of Slovaki 6-4, 7-6 (4). Top seed Andy Roddick, No. 2 seed John Isner, No. 3 Lleyton Hewitt and fourth seed Horacio Zeballos of Argentina will play their first singles matches later in the week. Serena doubtful for US Open Serena Williams is in doubt for the US Open because of her recent foot injury, according to the WTA Tour. Williams cut her right foot on broken glass at a restaurant shortly after winning Wimbledon. The tour said last week she needed surgery and would miss three tournaments leading up to the Open. On Monday, tour spokesman Andrew Walker said Williams is questionable for the final Grand Slam of the year. Dushevina, Paszek win Sixth-seeded Vera Dushevina of Russia reached the second round of the Slovenia Open Monday after rallying for a 2-6, 6-3, 6-3 win over countrywoman Anna Lapushchenkova. Tamira Paszek of Austria, who won the tournament in 2006 but is a wild card this year, also advanced by beating Jelena Kostanic Tosic of Croatia 7-5, 6-2. Andreja Klepac of Slovenia lost 6-3, 6-4 to Rossana de los Rios of Paraguay. Two other Russians also reached the second round. Virginie Razzano ousted Zuzana Kucova of Slovakia 6-2, 7-5, and Anna Chakvetadze defeated fellow Russian Ekaterina Makarova 6-4, 6-1. Koryttseva beats Malek Mariya Koryttseva of Ukraine saved a match point Monday before beating Tatjana Malek of Germany 6-7 (2), 7-6 (3), 6-2 in the first round of the Gastein Ladies. Simona Halep of Romania also advanced by defeating Renata Voracova of Czech Republic 7-5, 6