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MONTPELLIER, FRANCE - JULY 04: Andre Greipel of Germany and Lotto-Belisol crosses the line to win stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Aix-en-Provence, France. (Photo by Doug Pensinger/Getty Images) ( 172618712 )

Andre Greipel of Germany celebrates as he crosses the finish line to win the sixth stage of the Tour de France cycling race over 176.5 kilometers (110.3 miles) with start in Aix-en-Provence and finish in Montpellier, southern France, Thursday July 4, 2013. (AP Photo/Laurent Cipriani) ( APTOPIX Cycling Tour de France )

MONTPELLIER, FRANCE - JULY 04: Andre Greipel of Germany and Lotto-Belisol celebrates winning stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Montpellier, France. (Photo by Bryn Lennon/Getty Images) ( 172618798 )

AIX-EN-PROVENCE, FRANCE - JULY 04: Simon Gerrans of Australia and Orica Greenedge signs an autograph prior to stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Aix-en-Provence, France. (Photo by Bryn Lennon/Getty Images) ( 172610201 )

AIX-EN-PROVENCE, FRANCE - JULY 04: Philippe Gilbert, world road race champion. of Belgium and BMC Racing Team signs an autograph prior to stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Aix-en-Provence, France. (Photo by Bryn Lennon/Getty Images) ( 172610762 )

AIX-EN-PROVENCE, FRANCE - JULY 04: Simon Gerrans of Australia and Orica Greenedge plays air guitar with Australia fans prior to stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Aix-en-Provence, France. (Photo by Doug Pensinger/Getty Images) ( 172610217 )

The pack of riders cycles on its way during the 176.5 km fifth stage of the centenary Tour de France cycling race from Aix-En-Provence to Montpellier July 4, 2013. REUTERS/Jean-Paul Pelissier ( CYCLING-TOUR/ )

MONTPELLIER, FRANCE - JULY 04: The peloton passes beneath an aquaduct during stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Montpellier, France. (Photo by Bryn Lennon/Getty Images) ( 172618144 )

MONTPELLIER, FRANCE - JULY 04: A member of the Orica Greenedge team heads the peloton to stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Montpellier, France. (Photo by Bryn Lennon/Getty Images) ( 172620877 )

Spectators cheers as the pack passes during the sixth stage of the Tour de France cycling race over 176.5 kilometers (110.3 miles) with start in Aix-en-Provence and finish in Montpellier, southern France, Thursday July 4, 2013. (AP Photo/Christophe Ena) ( Cycling Tour de France )

The pack rides during the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521131827 )

Astana team rider Janez Brajkovic of Slovakia receives medical care after he fell during the 176.5 km fifth stage of the centenary Tour de France cycling race from Aix-En-Provence to Montpellier July 4, 2013. REUTERS/Jacky Naegelen ( CYCLING-TOUR/ )

Britain's Mark Cavendish prepares before setting off again after a fall during the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521134731 )

The pack rides during the sixth stage of the Tour de France cycling race over 176.5 kilometers (110.3 miles) with start in Aix-en-Provence and finish in Montpellier, southern France, Thursday July 4, 2013. (AP Photo/Laurent Cipriani) ( Cycling Tour de France )

Best sprinter's green jersey, Slovakia's Peter Sagan, waits for the start of the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521133745 )

AIX-EN-PROVENCE, FRANCE - JULY 04: A young fan watches the publicity caravan prior to stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Aix-en-Provence, on July 4, 2013 in Montpellier, France. (Photo by Doug Pensinger/Getty Images) ( 172621564 )

The pack of riders cycles on its way during the 176.5 km fifth stage of the centenary Tour de France cycling race from Aix-En-Provence to Montpellier July 4, 2013. REUTERS/Jacky Naegelen ( CYCLING-TOUR/ )

MONTPELLIER, FRANCE - JULY 04: Mark Cavendish of Great Britain and Team Omega Pharma Quick-Step fights his way back to the peloton after crashing on during stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Montpellier, France. (Photo by Bryn Lennon/Getty Images) ( 172623092 )

Supporters hold the national flag of the United States of America along the road on July 4, 2013, the USA's national day, as riders compete during the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521136856 )

The pack of riders cycles on its way during the 176.5 km fifth stage of the centenary Tour de France cycling race from Aix-En-Provence to Montpellier July 4, 2013. REUTERS/Jacky Naegelen ( CYCLING-TOUR/ )

The pack with Christopher Froome of Britain, third Sky Procycling team rider, rides on a tree-lined road during the sixth stage of the Tour de France cycling race over 176.5 kilometers (110.3 miles) with start in Aix-en-Provence and finish in Montpellier, southern France, Thursday July 4, 2013. (AP Photo/Laurent Cipriani) ( Cycling Tour de France )

Snails are pictured as the pack rides behind during the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521132001 )

The pack rides past horses during the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. PASCAL GUYOT/AFP/Getty Images ( 521136886 )

The pack of riders cycles on its way during the 176.5 km fifth stage of the centenary Tour de France cycling race from Aix-En-Provence to Montpellier July 4, 2013. REUTERS/Jacky Naegelen ( CYCLING-TOUR/ )

A tatoo is seen on the leg of Omega Pharma - Quick Step's France's Sylvain Chavanel as he waits for the start of the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JOEL SAGET/AFP/Getty Images ( 521136965 )

MONTPELLIER, FRANCE - JULY 04: Mark Cavendish of Great Britain and Team Omega Pharma Quick-Step looks on as Andre Greipel of Germany and Lotto-Belisol crosses the line to win stage six of the 2013 Tour de France, a 176.5KM road stage from Aix-en-Provence to Montpellier, on July 4, 2013 in Aix-en-Provence, France. (Photo by Doug Pensinger/Getty Images) ( 172618767 )

Stage winner Germany's Andre Greipel celebrates on the podium after winning the 176.5 km sixth stage of the 100th edition of the Tour de France cycling race on July 4, 2013 between Aix-en-Provence and Montpellier, southern France. JEFF PACHOUD/AFP/Getty Images ( 521136281 )

Daryl Impey of South Africa, wearing the overall leader's yellow jersey, celebrates on the podium of the sixth stage of the Tour de France cycling race over 176.5 kilometers (110.3 miles) with start in Aix-en-Provence and finish in Montpellier, southern France, Thursday July 4, 2013. (AP Photo/Laurent Cipriani) ( Cycling Tour de France )