Simona Halep, suspended since October for testing positive for a banned substance, faces a second doping charge.

Reuters reported that the latest charge stems from his Athlete Biological Passport showing irregularities in his profile.

«We understand that today’s announcement adds complexity to an already high-profile situation… We remain committed to engaging with Ms. Halep in an empathetic, efficient and timely manner,» Nicole Sapstead, senior director of anti-doping at the Agency International Tennis Integrity Committee, said in a statement.

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Simona Halep of Romania reacts while playing against Daria Snigur of Ukraine in the first round of the US Open at the USTA Billie Jean King National Tennis Center on August 29, 2022 in New York City. (Robert Prange/Getty Images)

«It would be inappropriate for us to comment on specific details until the conclusion of the process, but we will continue to engage with Sport Resolutions’ independent tribunal and Ms Halep’s representatives as soon as possible.»

Simona Halep's backhand

Simona Halep of Romania plays a backhand during her match against Anastasia Potapova of Russia during the Western and Southern Open at the Lindner Family Tennis Center on August 16, 2022 in Mason, Ohio. (Dylan Buell/Getty Images)

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Halep had previously been suspended due to a positive test for roxadustat at the US Open last year, which she denied knowingly taking.

The Romanian was ranked World No. 1 for a total of 64 weeks in her career, winning the 2018 French Open and 2019 Wimbledon championships. She reached the final of the Australian Open in 2018 and her best result at the US Open is the 2015 semifinal.

Simona Halep's right

Simona Halep of Romania during practice before the US Open Tennis Championships at the USTA Billie Jean King National Tennis Center on August 28, 2022 in New York City. (Robert Prange/Getty Images)

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It is currently ranked 30th in the world.