Denis Vladimirovich Laktionov (Russian: Денис Владимирович Лактионов; born 4 September 1977) is a Russian football coach and a former player. He is the manager of FC Rodina Moscow. He became a naturalized South Korean citizen in 2003, and was known as Lee Seong-nam while playing for Seongnam Ilhwa Chunma.
|Full name||Denis Vladimirovich Laktionov|
|Date of birth||4 September 1977|
|Place of birth||Novosibirsk, Soviet Union|
|Height||1.76 m (5 ft 9 1⁄2 in)|
|FC Rodina Moscow|
|1996–2002||Suwon Samsung Bluewings||161||(42)|
|2003–2005||Seongnam Ilhwa Chunma||79||(14)|
|2005||→ Busan I'Park (loan)||4||(0)|
|2006–2007||Suwon Samsung Bluewings||16||(0)|
|2011–2012||FC Tom Tomsk (assistant)|
|2012||FC Sibir Novosibirsk (assistant)|
|2015||UOR #5 Yegoryevsk|
|2019–||FC Rodina Moscow|
|* Senior club appearances and goals counted for the domestic league only|
|Revised Romanization||I Seongnam|
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In December 2007 he returned to Russia and signed a two-year contract with Sibir Novosibirsk in the Russian First Division. He was released by Sibir in the summer 2008 and became a free agent. He re-signed with Sibir in the winter of 2008.
While not being selected for the final Russian squad, Laktionov was involved in the training camp for the 2002 FIFA World Cup. Laktionov made his debut for Russia on 17 May 2002 in a friendly game against Belarus. He also played for the Olympic team.
His cousin Aleksandr Laktionov was also a footballer.