(AGI) Reims, July 10 - Germany's Andre' Greipel (Lotto Belisolteam) won the 194 km sixth stage of the Tour de France fromArras to Reims. Greipel outsprinted his rivals with a powerfuland sustained effort that the other sprint specialists couldnot beat. Thus, Norway's Kristoff (Katusha) was relegated tosecond place, followed by Renshaw, Sagan and Kittel. Theoverall race leader remained unchanged. Vincenzo Nibali(Astana) retained the yellow jersey with a 50-second lead overPoland's Kwiatkowsky, one minute and 45 seconds over Belgium'sVan de Broeck, one minute and 54 seconds over Australia'sPorte, and two minutes and 11 seconds over Spain's Valverde andthe American Van Garderen. (AGI) . .