Den Bosch, Netherlands: Philipp Kohlschreiber of Germany upset top-seeded Nikolay Davydenko of Russia 6-2, 6-4 Tuesday in the first round of the Ordina Open. Davydenko, who has never won a title on grass, had been favored after Ivan Ljubicic withdrew with a back injury - but he never even broke Kohlschreiber's serve. Fabrice Santoro of France advanced over fifth-seeded Robby Ginepri after the American retired with breathing trouble at 6-1, 3-2. Also, second-seeded Tommy Robredo of Spain beat Croatia's Mario Cilic 6-4, 6-4. Safina eliminates Camerin On the women's side, second-seeded Dinara Safina of Russia rallied to beat Maria Elena Camerin of Italy 4-6, 6-2, 6-1 to reach the quarterfinals. Paola Suarez of Argentina also reached the final eight after beating Jelena Kostanic of Croatia 6-2, 6-0. Eighth-seeded Jelena Jankovic of Serbia-Montenegro beat Marrit Boonstra of the Netherlands 6-3, 6-0 in the first round. Ukraine's Alona Bondarenko advanced when Li Na of China retired with a sore neck at 1-1. Earlier, Vincent Spadea of the United States defeated Bjorn Phau of Germany 4-6, 6-1, 6-4; while Germany's Mischa Zverev edged Davide Sanguinetti of Italy 7-6 (4), 7-6 (5). Tomas Berdych of the Czech Republic withdrew because of a left leg injury Monday, a day after losing the Halle final to Roger Federer. Also, Nicolas Kiefer of Germany pulled out with a hurt wrist.