The Rivalries to Watch at the Beijing Olympics. Althaus, Katharina (1996- ), Chen, Nathan, Diggins, Jessica (1991- ), Dukurs, Martins (1984- ), Dukurs, Tomass (1981- ), Fourcade, Martin, Gu, Eileen, Hanyu, Yuzuru, Kim, Chloe (2000- ), Mastro, Maddie (2000- ), Takanashi, Sara