LONDON (AP)—Ukrainian teen Kristina Antoniychuk has been suspended from tennis for 14 months for doping.

The International Tennis Federation said on Wednesday the 19-year-old Antoniychuk tested positive for the banned diuretic furosemide at the Mexican Open on Feb. 22. She said the drug got into her system through a prescription.

The ITF accepted her explanation, but says that she lacked a therapeutic exemption and that players are responsible to ensure ``no prohibited substance enters his-her body.''

Antoniychuk's ban will end on April 21, 2011. Her results since the date of the positive test will be disqualified.