Tipsarevic in tip-top shape in Moscow
The Serbian took an instant break of serve in the first set, and despite the Russian creating three break point chances, he could not take them.
Tursunov, the sixth seed at his home event, fought valiantly to stay in the contest, denying Tipsarevic four break points early in the second set, but could not repeat the trick in the third game, allowing the Serbian a lead he did not relinquish.
"It was my best match in a long time but now it will be even tougher against Davydenko," said Tipsarevic. "It is not great to play against three Russian players in Moscow but the crowd has been very fair, applauding my good shots."
Davydenko, 30, is a three-time champion in Moscow, and looked a cut above his German opponent in his quarter-final.
"I played well from the baseline but I am struggling with my serve," admitted the Russian. "I can't serve at full speed but I have been able to win my first two matches in straight sets. I wasn't able to play in Beijing and Shanghai so I want to do well in the last few tournaments because I have points to defend."
The three sets lasted three hours, 38 minutes, with neither player giving an inch until the Serbian, champion here in 2010, got the better of the American in the decisive breaker.
"Mentally and physically it was very tough and I am exhausted now," said Troicki.
His semi-final opponent will be Jeremy Chardy after the Frenchman dispatched Germany's Philipp Kohlschreiber 6-4 6-3 in his quarter-final.