Poland's Kamil Majchrzak, facing four-year suspension over positive drug test, hit with 13-month ban

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Polish tennis player Kamil Majchrzak was suspended 13 months after testing positive for banned substances, which he said Thursday stemmed from an "isotonic drink" that contained the prohibited substances. 

The International Tennis Integrity Agency (ITIA) announced Majchrzak would be suspended until December after initially being suspended in November 2022 following several positive drug tests. 

Kamil Majchrzak of Poland plays a forehand against Brandon Nakashima of the U.S. during a men's singles first-round match at the 2022 French Open at Roland Garros May 23, 2022, in Paris.  (Adam Pretty/Getty Images)

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"The ITIA accepted that Majchrzak had not knowingly or intentionally ingested the Prohibited Substances, and further mitigating evidence includes the player’s consultation with a (dietitian) about the supplement and its ingredients," a press release from the ITIA stated.  

"During this period, the player is prohibited from playing in or attending any tennis event authorized or sanctioned by the governing bodies of tennis." 

Majchrzak, 27, issued a lengthy statement on social media Thursday, explaining why his test results were positive despite his not knowing at the time he had ingested the banned substances. 

Kamil Majchrzak of Poland plays a forehand against Thanasi Kokkinakis of Australia during a men's singles first-round match at Wimbledon 2022 June 27, 2022, in London. (Ryan Pierse/Getty Images)

"The first step I took was to send all the supplements I was taking to an accredited laboratory for testing," Majchrzak