Her personal best is 1:59.34 minutes, achieved in May 2008 in Bucharest. She has 4:00.35 minutes in the 1500 metres, also achieved in May 2008 in Bucharest. She was removed from the Olympic squad prior to the 2008 Summer Olympics, as she failed a doping test for Erythropoietin (EPO) in May. She received a two-year ban from the sport from May 2008 to May 2010.
Popescu ran in the series of the 1500 m at the 2010 European Athletics Championships, but did not finish the race.
|1999||World Youth Championships||Bydgoszcz, Poland||2nd||800 m|
|2000||World Junior Championships||Santiago, Chile||3rd||4x400 m relay|
|2003||Universiade||Daegu, South Korea||1st||800 m|
|2008||World Indoor Championships||Valencia, Spain||6th||1500 m|