Cup World Group first round in Tokyo, Japan defeated Canada 4–1, and Nishikori had a hand in three Japan victories in the tie. He beat Peter Polansky and Frank Dancevic in the singles rubbers, and teamed up with Yasutaka Uchiyama for a victory in doubles over Dancevic and Daniel Nestor. Japan advanced to the quarterfinals in the World Group for the first time, but Nishikori missed the quarterfinal against Czech Republic due to a left groin injury. Olympics Nishikori represented Japan at his maiden Olympics in Beijing 2008. He lost in the first round to Rainer Schüttler of Germany in three sets. At the London 2012 Olympics, Nishikori competed in the singles and doubles competitions, partnering Go Soeda. In the singles, as the 15th seed, he reached the quarterfinals, knocking out Bernard Tomic, Nikolay Davydenko, and fourth seed David Ferrer on the way. He became the first Japanese man to reach the quarterfinals since Takeichi Harada in the 1924 Paris Olympics. However, his run was ended by eighth seed Juan Martín del Potro of Argentina. In doubles, Nishikori and Soeda were eliminated in the first round by Switzerland's defending champions Roger Federer and Stan Wawrinka. Fresh from his Rogers Cup finals appearance in Toronto, Nishikori represented Japan at the Rio 2016 Olympics, where he was seeded fourth. In the semifinals, he lost to Andy Murray and faced Rafael Nadal for the bronze medal match, which he won in three sets; it was the first Olympic tennis medal for Japan in 96 years. Rivalries Nishikori vs. Wawrinka Nishikori and Wawrinka have met eleven times, with Nishikori trailing 4–7. Wawrinka won both of their first two meetings in 2012, in the third round of the Cincinnati Masters and in the quarterfinals of Buenos Aires, respectively. Nishikori recorded his first win against Wawrinka in the quarterfinals of the 2014 US Open in a thrilling five-set match; Nishikori later became the finalist of the tournament. They met in another Grand Slam quarterfinal, this time at the 2015 Australian Open. Wawrinka beat Nishikori in straight sets. They met three times in 2016. Nishikori won two of those meetings. They both qualified for the 2016 ATP World Tour Finals and were drawn in the same group. Nishikori defeated Wawrinka in their round-robin match. Wawrinka won their most recent meeting at the 2019 Madrid Open. Nishikori vs. Raonic Nishikori and Raonic have met seven times, with Nishikori