The Garmin-Transisions rider beat Lampre's Grega Bole to the line and took the yellow jersey on the fifth stage from Astrzebie Zdrój to Ustron.
Martin, this season finished 57th in the Giro D'Italia.
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High Road Sports announces the re-signing of road captain and classics specialist Bernhard Eisel for 2011 and 2012. Eisel recently helped the team to five stage wins at the Tour de France and pulled off a big victory earlier in the year winning Ghent-Wevelgem.
"Bernie is an integral part of the team and important for us in many ways," says Team Manager Rolf Aldag. "We have a long relationship with him and we rely on him as a road captain, where he does a great job of leading by example on and off the road, and as a leader for the classics."
"A diverse rider like Bernie who has a multifunctional role in the team is essential and we are pleased to have him back for the next two years of racing," added Aldag.
"I'm really happy to be back again," said Eisel. "For me this team is the best because I get the freedom to ride for my own goals in the classics and I enjoy riding for the best sprinter in the world at the Tour de France, which is my second goal each season."
"We have a lot of fun on this team and together we get stronger and stronger each year so I'm happy with that," he added.