Her most unlikely victory came at the 2004 World Indoor Championships. She was awarded the gold medal after Ukraine's Vita Pavlysh was stripped of her title for failing a drugs test. This was the second time Pavlysh was found to have taken anabolic steroids and lost a World indoor title; she was subsequently banned from athletics for life.
The IOC retested the samples from the 2004 Olympics and diagnosed a positive test. Krivelyova lost her third place to Nadzeya Ostapchuk (the bronze medal was not awarded). In April 2013, she was banned from competitions for two years.