Nicolas Almagro bounced in quarters

KUALA LUMPUR, Malaysia -- Kei Nishikori of Japan ousted top-seeded Nicolas Almagro of Spain 6-7 (5), 6-4, 6-4 Friday to reach the semifinals of the Malaysian Open.

The eight-seeded Nishikori will face Janko Tipsarevic of Serbia, who advanced after Nikolay Davydenko of Russia retired with a left hip injury just four games into their match. The third-seeded Tipsarevic was leading 3-1.

"I don't know what the injury is exactly yet," Davydenko said. "I'm a bit scared as I've never had anything like it before. I will still go to Beijing, maybe wait a few days and see what the pain is like."

Serbia's Viktor Troicki also cruised into the semifinals by beating Dmitry Tursunov of Russia 6-4, 6-4.

The second-seeded Troicki failed to serve out the match at 5-2 in the second set but held on for victory at Putra Stadium. Troicki is looking for his first title of the year after losing the final in Sydney in January.

He will face Marcos Baghdatis of Cyprus, who defeated fourth-seeded Jurgen Melzer of Austria 6-3, 7-6 (3).