Career
Karlopoulos started his professional career for Iraklis and he has also played for and Doxa Dramas. Karlopoulos started his professional career for Greek Superleague side Iraklis. He debuted for Iraklis as an injury time substitute, in a 5-0 away defeat of Iraklis.
After being released from Iraklis, Karlopoulos signed a three-year contract οn 31 August 2009 for, then a side.
His first match for was an 1-3 home defeat from Kerkyra, for the opening round of the 2009-2010 season. Until the end of the season Karlopoulos appearad in 11 matches.
In the summer of 2010 Karlopoulos moved to Doxa Dramas. He only appeared in one more game for Doxa Dramas, before signing for Ethnikos on 31 January 2011.