Sergey Tatevosyan (born 4 January 1973) is a Russian former professional boxer who competed from 2000 to 2007.
Tatevosyan made his professional debut on 29 January 2000, when he beat countryman Alexander Komarov on technical knockout in the fourth round.
On 24 June 2000, he won for the first time the Russia middleweight title to Nikolay Talalakin.
In 2003, he won vacant WBC International middleweight title by unanimous decision against Ghanaian boxer James Obede Toney.
Tatevosyan fought Lucian Bute on 26 January 2007 in Montreal for WBO Inter-Continental super middleweight title.