BEIJING -- U.S. Open runner-up and reigning Beijing champion Novak Djokovic advanced to the quarterfinals at the $3.337 million China Open when American Mardy Fish withdrew from their scheduled second-round affair.
The top-seeded Djokovic was slated to meet Fish, who pulled out of the draw with a left ankle injury. The Serbian star will meet dangerous Frenchman Gilles Simon in the quarterfinals here on Friday.
Russian star Nikolay Davydenko, seeded fourth this week, also moved into the quarters and notched his 400th career win on the ATP World Tour with a 7-5, 7-5 victory over Croat Marin Cilic, who was the runner-up to Djokovic here last year. Davydenko became the eighth active player to reach 400 wins.
In the quarterfinals, Davydenko will face 6-foot-9 American wild card John Isner, who edged out Philipp Kohlschreiber of Germany 7-6 (7-3), 3-6, 6-3 in 2 hours, 13 minutes. Isner slammed 20 aces in the win.
In an even longer second-round battle, Simon outlasted German qualifier Michael Berrer 6-7 (6-8), 6-4, 7-6 (7-4) in 3 hours, 7 minutes.
On Thursday here in Beijing, second-seeded Australian Open runner-up Andy Murray and third- seeded French Open finalist Robin Soderling will take to the courts for their second-round matches.
This week's champ will collect $500,000.