Career
He played at international level for Australia. Club career He began his career with Sydney Olympic, First Grade, at the age of 15. He was then signed by the Greek team Panathinaikos, where he played for five years.
Olympiakos, a rival Greek club, then signed him.
On his debut against his former team he scored with his famous bicycle kick from outside the box. He played for Olympiacos another five years before returning to Sydney Olympic to finish his career, playing two years before retiring.
International career Kalantzis played seven matches in full international matches for Australia. In February 2011, Olympiacos Certified Financial Planner announced the establishment of its first Olympiacos Academy outside of Greece in Sydney, Australia.
The Australian academy is managed by Kalantzis and Kyriakos Tohouroglou, both former Olympiacos players.