Utrecht (Netherlands) (AFP) - Australia's Rohan Dennis will wear the first yellow jersey of the 2015 Tour de France after winning the opening stage timetrial in Utrecht on Saturday.In the midst of a heatwave, Dennis was the only rider to complete the 13.8km course in under 15 minutes and beat three-time world timetrial champion Tony Martin into second with four-time world champion Fabian Cancellara third.Join the conversation about this story »