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Born in Agrinio, Roussis began playing football with his hometown club, Panetolikos F.C. in Gamma Ethniki.
On 23 August 2010, he signed a 1-year loan contract with Gamma Ethniki team Aias Salamina F.C..
Ntinos Konstantakis (born 13 April 1986 in Heraklion, Greece) is a Greek football player who played for Olympiakos Chersonissos during the 2008–09 Gamma Ethniki season.
Petrou began playing football as a defensive midfielder for Aiolikos F.C. in the Gamma Ethniki.