"Galeotte" the traces of Roxadustat, a drug that stimulates the production of red blood cells used in the treatment of patients with kidney problems.
The former number one in world tennis, the Romanian Simona Halep, 31, therefore tested positive for doping.
The athlete, now number 9 in the ranking, has been provisionally suspended as announced by ITIA, the International Agency for the Integrity of Tennis.
The tennis player's champion was taken from the US Open at the end of August.
Immediate reaction from Halep who on social media called the test result
"the biggest shock of my life".
"In the course of my career
- wrote the 31-year-old winner of Roland-Garros 2018 and Wimbledon 2019 -
the idea of cheating has never crossed my mind, because it is totally against all the values I was raised with. I will fight until the end -
he concluded
- to prove that I have never knowingly taken a banned substance and I am sure that, sooner or later, the truth will come out ".