The 18-year-old has been selected to trial for the Under 20 Greek international side.
It?s come as a huge achievement for Tsattalios who has been getting much needed game time with Abbas Saad?s Penrith Nepean squad in the last few weeks.
Tsattlios was one of three Sydney FC players to have gone off and played during the A-League off-season with a TeleChoice Premier League side.
It is understood that the Australian Under 20 side could possibly be fielding him with an offer as he was also named as a stand-by player for the U17 Joeys squad for the AFC Championships in 2006.
Tsattalios has been busy making a name for himself at the current Greek U20 camp where close sources have stated has made a positive impact in cracking into the side.