Zhang Zhizhen is a Chinese professional tennis player. He reached his career-high singles ranking of world No. 52 on 26 June 2023, and his career-high doubles ranking of world No. 211 in September 2017. He has won three singles and two doubles titles on the ATP Challenger, and two singles and two doubles titles on the ITF Futures Tour. In 2021, Zhang became the first Chinese man in the Open Era to play in the main draw at Wimbledon. In October 2022, he became the first Chinese player to reach the top 100 in the ATP singles rankings. Then, in 2023 in Madrid, he became the first Chinese man to reach an ATP Tour Masters 1000 quarterfinal. As of July 2023, he became the highest-ever ranked Chinese male tennis player.