NEW YORK - Former world number one Simona Halep is suing the Canadian company that produced a nutritional supplement that she believes led to her being handed a four-year ban for doping that could end her career.

Halep is seeking more than $10 million in damages from Quantum Nutrition, which operates as Schinoussa Superfoods, after testing positive at the 2022 U.S. Open for Roxadustat, a drug often used by people with anaemia.