American Varvara Lepchenko has been provisionally suspended for an anti-doping rule violation, the Worldwide Tennis Federation has confirmed.
The 35-year-old returned a optimistic check which contained metabolites of adrafinil and/or modafinil on the Hungarian Grand Prix in July.
Each substances are banned by the World Anti-Doping Company, the ITF mentioned.
Lepchenko is 124th within the WTA world rankings.
A pre-charge discover was issued to Lepchenko, who previously represented Uzbekistan, on 9 August and her provisional suspension got here into impact on Thursday.
The ITF added: “Lepchenko had (and retains) the proper to use to the chair of the impartial tribunal convened to listen to her case why the provisional suspension shouldn’t be imposed (or needs to be vacated), however has not exercised that proper.”
Lepchenko final competed on the Thoreau Tennis Open in Harmony, Massachusetts, at the beginning of August and was crushed by Russian Vera Zvonareva within the final 16.