 In 1919, PAO played their first match against X.A.N.Thessaloniki (YMCA), another club also pioneer of basketball in Greece, a match which took place at the Panathenaic Stadium.In 1937, Kalafatis managed to create a new Panathinaikos team that, during the following year, tried to catch up with already established clubs like the YMCA, Ethnikos G.S.