The agency banned Halep last year after an investigation that was prolonged by detecting alleged irregularities in her biological passport, which can reveal abnormal blood values measured over several years.

The investigators also appealed to CAS and asked for a more severe ban of up to six years, said the court, whose judges dismissed the charge against Halep relating to her blood values.

The former top-ranked Romanian denied wrongdoing for the positive test and blamed contaminated nutritional supplements. Athletes need to prove the source of contamination to show they were not at fault for doping.

“Although the CAS panel found that Ms. Halep did bear some level of fault or negligence for her violations, as she did not exercise sufficient care when using the Keto MCT supplement, it concluded that she bore no significant fault or negligence,” the court said.

Halep challenged the ban at CAS and attended a three-day, closed-door hearing one month ago in Lausanne.

She won Wimbledon in 2019, beating 23-time major champion Serena Williams in the final, and the 2018 French Open.