THE TOUR DE FRANCE'S YELLOW JERSEY HAD AN AMERICAN ASSIST.

As Jonas Vingegaard becomes a Tour champion for the second time, Colorado’s Sepp Kuss has proven himself as an essential lieutenant for the strongest team in cycling

LE MARKSTEIN, France—Sepp Kuss rolled slowly across the finish line, nearly 21 minutes after the leaders, bruised and bleeding profusely from cut above his eye and on his cheek. He had crashed hard on a downhill early during Saturday’s 20th stage of the Tour de France and now, he really needed two things.