Previously, they had not played the semifinals, as Real Madrid was not allowed to travel to Soviet Riga by the Francoist authorities.

The first game was held on February 22, 1958, in Brussels, Belgium, where Belgian League champion Royal IV, defeated the Luxembourger League champions, Etzella Ettelbruck, by a score of 82–43.

[1] The most notable contributors to Riga's first title included center Jānis Krūmiņš and head coach Alexander Gomelsky.

European national domestic league champions only, playing in a tournament system.

The winners of the three pairs in Group B played against each other, in a tournament held in Milan, in order to determine the two clubs that would progress to the Quarterfinals *Union Beirut withdrew *The result of the game between the two clubs in the tournament of the 1st Round's Group B was used as a result for the 1st leg.