Career
At the 2008 Summer Olympics she defeated Japanese double gold medallist Ryoko Tani, who until then had been undefeated in major international competitions for 12 years. 2008 Summer Olympics
Dumitru defeated the legendary five-time Olympian Ryoko Tani by "keikoku" in a shocking –48 kg semifinal upset at the Beijing Science and Technology University Gymnasium. She controlled the five-minute showdown, maintaining her position with strong defense, refusing to budge or give her experienced foe a chance to mount a strong attack.
lieutenant worked, as Tani lost points for passivity.
2012 Summer Olympics
She took part in the Judo at the 2012 Summer Olympics but lost in the final against Sarah Menezes. In the semifinals, Dumitru beat world number one Tomoko Fukumi.