 On 23 November 1963, Panathinaikos beat Olympiacos, by a score of 90-48, in the Mantellos Cup, a tournament that was later replaced by the Greek Cup, which made its first appearance in 1976.In 1967, Panathinaikos were crowned Greek League champions, with Giorgos Kolokithas (one of the greatest basketball players of his era) in their ranks.In 1969, the conquest of the Greek League championship was followed by the first European success of the club, the qualification to the semifinals of the FIBA European Cup Winners' Cup 1968–69 season, where they were eliminated by Dinamo Tbilisi.