His quality as a defensive midfielder made him a hot prospect across Greece, and he was eventually signed by Greek first division club OFI Crete.
At only 20, Poursanidis soon became a first team regular for the Cretan club, making over 100 appearances in the black and white shirt until he was eventually picked up by Greek champions Olympiacos.
Also experiencing UEFA Champions League football, Poursanidis became a fan favourite in Piraeus for his determination and love for the badge which he showed in over 100 appearances spanning 6 years at the club.
Eventually making way for the younger Brazilian superstar Ze Elias, Poursanidis finished his career with a five-year spell at Iraklis FC.
He would eventually earn himself 22 caps, and become a key part of the UEFA Euro 2000 qualifying squad that barely missed out on the final tournament.