REIMS, France -- Andre Greipel of Germany won the sixth stage of the Tour de France in a sprint as the pack entered Champagne country, and Vincenzo Nibali of Italy retained the yellow jersey on Thursday.

The German champion collected his sixth career Tour stage victory by outpacing Norway's Alexander Kristoff in second and France's Samuel Dumoulin in third at the end of the 194-kilometre ride from Arras to Reims.

The Lotto Belisol rider burst out of the pack with less than 300 metres left, and clenched his fists, shouting, at the finish. His job was made a bit easier because Marcel Kittel, a fellow German who has won three stages and dominated the sprint finishes, got a flat tire right before the end.

"I had really good punch today, I am really happy," said Greipel, who turns 32 next Wednesday. "Of course I'm not looking at Kittel. I don't need to hide. I am still one of the fastest in the bunch.

"There was a lot of pressure on us, on my shoulders," for a win, he added. "It's a big relief for us."

The peloton faced intermittent drizzle over the mostly flat course, which was well suited for sprinters.

The top standings didn't change, as most of the contenders for victory in the three-week race trailed close behind the muscular Greipel. He was not a challenger for the overall title; like many sprinters, he does not fare well on the climbs that are crucial to winning in Paris. He's nearly 35 minutes behind Nibali.

Overall, Nibali has a two-second lead over teammate Jakob Fuglsang of Denmark. Peter Sagan of Slovakia was third, 44 seconds back.

Two-time Tour champion Alberto Contador, a day after losing about 2 1/2 minutes to Nibali, was dealt another setback on Thursday: His Saxo-Tinkoff teammate Jesus Hernandez dropped out after a crash.

Among other possible contenders, Richie Porte of Australia -- who inherited the role of Team Sky leader after the withdrawal of injured defending champion Chris Froome on Wednesday -- was 1 minute, 54 seconds back in eighth place. American Andrew Talansky, winner of the Criterium du Dauphine last month, was ninth 2:05 back. Spaniard Alejandro Valverde was 10th, 2:11 back, and compatriot Contador was in 18th, 2:37 behind.

The Tour has another mostly flat Stage 7, a 234.5-kilometre trek from Epernay to Nancy -- the second longest stage -- on Thursday.