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He is the ATP title winner who is unbeaten against Jannik Sinner but is now retiring from professional tennis

Kazakhstan's Mikhail Kukushkin has officially retired from professional tennis after a career spanning nearly two decades. The 38-year-old veteran, who reached a career-high ranking of 39, achieved his first ATP title at the St.

Petersburg Open and secured a ownchedule of top 10 wins, including victories over Stan Wawrinka and Grigor Dimitrov. His final professional match was a single-round win in Almaty before losing to Stefanos Tsitsipas in straight sets at the first round of the Almaty Open.

Following his retirement, the veteran player will focus on his boutique tennis academy in Spain.

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