Antoniadis scored 187 goals in 242 matches in the Greek Championship, and was top scorer five times: 1970 (25 goals), 1972 (39 –second in Europe- record in the Greek Championship until today), 1973 (22), 1974 (26) and 1975 (20). In 1971 when Panathinaikos reached the European Cup Final against Ajax, Antoniadis was the leading scorer in the tournament with 10 goals.