Official Site of the 2020 US Open Tennis Championships - A USTA Event
Kei Nishikori downs Philipp Kohlschreiber to advance to U.S. Open quarters - Sportsnet.ca
Nishikori withdraws from Australian Open
Ivo Karlovic v Kei Nishikori match highlights (2R) | Australian Open 2019 - YouTube
Kei Nishikori vs Maxime Janvier - Round 1 Highlights | Roland-Garros 2018 - YouTube
US Open 2018: Kei Nishikori downs seventh seed Marin Cilic in five sets to progress to semi-finals - Sports News , Firstpost
Kei Nishikori Upsets No.13 Seed Diego Schwartzman. - YouTube
Australian Open: Kei Nishikori survives scare vs Pablo Carreno Busta to enter quarters - Sports News
Kei Nishikori (JPN), Michael Chang, JUNE 2, 2018 - Tennis : Kei Nishikori of Japan and his coach Michael Chang during a training session prior to the Men's single fourth round match
Australian Open 2018: Kei Nishikori ruled out by injury
Kei Nishikori Photostream | Kei nishikori, Wimbledon, The championship