Kei Nishikori (born on December 29, 1989) is a Japanese professional tennis player. He is from Matsue in Shimane. He graduated from Nogi elementary school, Kaisei junior high school, and Aomori-yamada high school. He is right-handed.
He began tennis when he was five years old. He has achieved a national Triple Crown at 11 years old and he was trained in the United States from 13 years old. He turned professional when he was 17 years old and he won his first professional tournament at 18 years old. He injured his elbow in 2009, but he returned the following year. As of August 2015, he is ranked number 4 in the world.
- "Kei Nishikori". ATP Tour, Inc. Retrieved 5 January 2015.
- Paul Malone (13 December 2014). "Australian Open 2015: Kei Nishikori rated a strong chance by Andre Agassi". Courier Mail. Retrieved 5 January 2015.