Until the very end of Saturday’s 1.6-kilometer freestyle sprint race in Cogne, Italy, American Jessie Diggins had those watching on the edge of their seats. She advanced as the lucky loser in her quarterfinal and then once again in her semi final, before winning the final in a lunge to the line. “Man I am glad they do lucky losers here!” Diggins told the International Ski Federation after winning Saturday’s sprint. “It’s so fun to...