Yekaterina Aleksandrovna Kostetskaya is a Russian track athlete. She came fifth in the 800 m final at the 2011 World Championships in Athletics, but was later disqualified for doping.
Doping
IAAF announced 28 July 2014, that Kostetskaya was sanctioned for doping after her biological passport had shown abnormalities. The two-year ban ended 20 January 2015. ==International competitions==