Seeded players Nikolay Davydenko and Kei Nishikori collected first-round wins Tuesday at the Malaysian Open tennis tournament. Davydenko, seeded fifth, defeated Ryan Harrison 6-3, 6-2 by getting seven service breaks. Davydenko won 59 percent of the points when receiving serve but won just more than half (33-30) when serving. He saved nine of 12 break points he faced. The eighth-seeded Nishikori rallied for a 4-6, 6-4, 6-1 win over Teymuraz Gabashvili. He lost his serve four times but only once after the first set. Qualifier Rik de Voest earned a second-round slot with a 4-6, 6-3, 6-3 win over Ryan Sweeting. De Voest lost all three of the break points he saw in the first set but didn\'t drop his serve after that. In other first-round play Tuesday, Philipp Petzschner defeated Mischa Zverev 7-5, 6-3; Lukasz Kubot topped Lukas Rosol 6-3, 6-3; and Somdev Devvarman edged past Mikhail Ledovskikh 7-6 (7-5), 6-4. Also, Albert Ramos advanced when Mikhail Kukushkin retired with Ramos ahead 4-6, 6-3, 4-2.