Seydou Doumbia was born on 31 December, 1987. He is an Ivorian professional footballer who plays as a forward for Sporting on loan from Roma. He started his career at the Inter FC youth academy and started playing at second division partner club AS Athlétic Adjamé in 2003. He joined second division team Toumodi on loan for the 2004–05 season and was on loan in 2005 at AS Denguélé where he became Côte d’Ivoire Premier Division top scorer with 15 goals. In 2006, he moved to Japan where he played for Kashiwa Reysol and then Tokushima Vortis. He left Asia on a free transfer and signed for BSC Young Boys in Europe in the summer of 2008, before failing a trial in Rapid Bucharest.
In the Swiss Super League, Doumbia scored 20 goals in his maiden season and 30 in the 2009–10 season, making him twice top goalscorer in the Swiss Championship. In January 2010, Russian club CSKA Moscow completed the transfer of Doumbia on a five-year deal, for a reported fee of €15 million. Under the terms of the contract, he would stay at Young Boys until the end of the season before moving to Russia.
Seydou first goal of the new league campaign came on 17 April 2011, in their third Premier League fixture when he latched on to a Tomáš Necid cross and pushed it by Rubin goalkeeper Sergey Ryzhikov; the away win pushed the Army Men up into first place in the table.
He has played for several clubs among which are; AS Roman, CSKA Moscow, Newcastle United, Basel, Sporting.
Doumbia earned his first international cap for Ivory Coast in a friendly against Japan during the Kirin Cup on 24 May 2008. He scored his first international goal in a friendly against Germany on 18 November 2009 in a 2–2 draw. He was selected for Ivory Coast in the 2010 World Cup, but only made one appearance, as a 79th-minute substitute for Romaric, in the 3–0 win against North Korea.