Mao Asada of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Vadim Ghirda)
China’s Liu Yin shouts instructions from the house during a round robin match against Japan at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Morry Gash)
Mao Asada of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Vadim Ghirda)
Akiko Suzuki of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Darron Cummings)
Mao Asada of Japan walks after a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Vadim Ghirda)
Mao Asada of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Vadim Ghirda)
Mao Asada of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Darron Cummings)
Mao Asada of Japan skates during a practice session at the figure stating practice rink at the 2014 Winter Olympics, Monday, Feb. 17, 2014, in Sochi, Russia. (AP Photo/Vadim Ghirda)
Kei Nishikori, of Japan, reacts after his return to Ivo Karlovic, of Croatia, in the singles final at the U.S. National Indoor Tennis Championships, Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Ivo Karlovic, of Croatia, hits a return to Kei Nishikori, of Japan, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Kei Nishikori, of Japan, hits a return to Ivo Karlovic, of Croatia, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Ivo Karlovic, right, of Croatia, congratulates Kei Nishikori, of Japan, for winning the singles final 6-4, 7-6 (0) at the U.S. National Indoor Tennis Championships, Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Ivo Karlovic, of Croatia, hits a backhand return to Kei Nishikori, of Japan, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Ivo Karlovic, of Croatia, serves to Kei Nishikori, of Japan, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Kei Nishikori, of Japan, hits a return to Ivo Karlovic, of Croatia, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Kei Nishikori, of Japan, hits a return to Ivo Karlovic, of Croatia, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)
Kei Nishikori,of Japan, hits a return to Ivo Karlovic, of Croatia, in the singles final at the U.S. National Indoor Tennis Championships on Sunday, Feb. 16, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)