Along the way, Olympiacos developed a habit for luring Ethnikos' best players, like Greek national team players Philippos Kourantis in the late 1920s, Yiannis Chelmis in the late 1930s and Yiannis Ioannou in the early 1950s.long the way, Olympiacos developed a habit for luring Ethnikos' best players, like Greek national team players Philippos Kourantis in the late 1920s, Yiannis Chelmis in the late 1930s and Yiannis Ioannou in the early 1950s.