is an inactive Japanese professional tennis player. He is the second male Japanese player to have been ranked in the top 5 in singles (after Jiro Sato), and the only one to do so in the Open Era. Nishikori first reached his career-high singles ranking of world No. 4 in March 2015. Nishikori has won 12 singles titles and was runner-up at the 2014 US Open, making him the first male player representing an Asian country to reach a Grand Slam singles final. He also became the first man from Asia to qualify for the ATP Finals and reached the semifinals in 2014 and 2016. In addition, Nishikori defeated Rafael Nadal to win the bronze medal at the 2016 Summer Olympics, bringing Japan its first Olympic tennis medal in 96 years. Nishikori also holds the record for the highest win percentage in matches extending to 5 sets, with a record of 27-7 and a win percentage of 79.4%. Personal life Nishikori was born in Matsue in Shimane Prefecture, Japan. His father, Kiyoshi, is an engineer, and his mother, Eri, is a piano teacher. He has an older sister, Reina, who graduated from college and works in Tokyo. He began playing tennis at the age of five. He first won the All Japan Tennis Championships for Kids in 2001, and graduated from Aomori-Yamada High School. Nishikori moved to Bradenton, Florida to join the IMG Academy in 2004 at 14 years of age. Nishikori was previously coached by Brad Gilbert. Dante Bottini has been his current coach since December 2010. Former world No. 2 Michael Chang was added to his coaching team beginning in January 2014. Nishikori married his long-term girlfriend Mai Yamauchi in December 2020. His pastimes include football, golf, reading, and listening to music. In August 2020, having not played since the 2019 US Open due to injury and the coronavirus pandemic, Nishikori tested positive for COVID-19. Career Junior career Nishikori played his first junior match in April 2002 at the age of 13 at a grade 1 tournament in Japan. He won the 2004 title at the Riad 21 Tournament in Rabat, Morocco, and was a boys' singles quarter-finalist at the 2006 Junior French Open; he partnering Emiliano Massa to win the boys' doubles title at that tournament. Nishikori won the 2007 Luxilon Cup held at the 2007 Sony Ericsson Open by defeating Michael McClune. As a junior, he