Chris Froome was the young British upstart at the London Olympics four years ago when compatriot Bradley Wiggins was fresh off his Tour de France triumph and targeting time trial gold.
Now, it is Froome is trying to pull off the rare double.
The reigning Olympic bronze medalist is coming off his third victory on the Champs-Elysees in four years, accomplished in part by his ability to race against the clock, and is one of the heavy hitters in the time trial on Wednesday at the Rio Games.
"I was really chuffed to get bronze four years ago. It was really important to me," Froome said, "and to be able to medal here after the summer I've had, it would just...