Zhang Zhizhen

Zhang Zhizhen (; ; born 16 October 1996), is a Chinese professional tennis player. He has won two singles and two doubles titles on the ATP Challenger and two singles and two doubles titles on the ITF Futures Tour. He reached his career high singles ranking of World No. 136 in February 2020 and his career high doubles ranking of World No. 211 in September 2017.
Career.
Zhang made his first ATP tour debut in the 2015 Shenzhen Open. As a qualifier, he defeated Japanese Go Soeda in straight sets in the first round. He eventually lost to the 6th seed Jiří Veselý in straight sets.
In the 2017 ATP Shenzhen Open, Zhang, as a qualifier, upset the 4th seed and world No. 39 Paolo Lorenzi in the second round. He then lost to Henri Laaksonen in the third round.
On 26 November 2017, defeating Te Rigele 5–7, 7–6(8–6), 6–3, Zhang won the China Tennis Grand Prix Cup title for the first time.
In 2019, Zhang won two ATP challenger titles in Jinan and Shenzhen. At the ATP level, he reached the second rounds at Zhuhai and Beijing, both as wildcard holder, defeating German Dominik Koepfer and British Kyle Edmund in the first round matches respectively. 