Giannakopoulos, who became a father for the second time last week, will win his 70th cap for Greece as they take on one of the home countries Northern Ireland, hoping to keep their place at the top of the table following fine wins over Sweden and Armenia in Group 6 of the Euro 2004 matches.
Jaaskelainen on the other hand may have to once again settle for a place on the bench due to the return to fitness of Southampton goalkeeper Antti Niemi as Finland aim to build on their Group 9 draw with Wales as they take on Canada in a Friendly match in Helsinki.