Career
Tregubova made her Olympic debut, as Moldova"s youngest swimmer (aged 16), at the 2000 Summer Olympics in Sydney, where she competed in the women"s 50 m freestyle. Swimming in heat four, she edged out Uzbekistan"s Saida Iskandarova to pick up a fifth seed and fifty-fourth overall by 0.23 of a second in 27.75. At the 2004 Summer Olympics in Athens, Tregubova qualified again for the 50 m freestyle by eclipsing a FINA B-cut of 26.90 from the Russian Open Championships in Moscow.
Swimming in the same heat as Sydney, she picked up a second spot over Aruba"s Roshendra Vrolijk by 0.03 of a second, outside her entry time of 28.40.
Tregubova failed to advance into the semifinals, as she placed forty-eighth overall out of 75 swimmers on the last day of preliminaries.