EuroBasket 1955
Through four preliminary round games and the first three final round games, the Soviets extended their winning streak to 31 games. With four games left in the final round robin of EuroBasket 1955, the Soviets were facing the pesky Czechoslovakia team, which was so far had been the closest to defeating the Soviet Union, in 1951. Czechoslovakia, however, had already lost twice in the round, and had a record of 1-2 to the Soviets' 3-0 going into the game.
In a shocking result, the 81-74 final score did not favor the Soviet Union. The undefeatable titan had been beaten. They did so once more before the tournament was over, losing to Hungary in a game that essentially determined the gold medal despite being only the 6th of 7 matches each team played. The Soviets' 5-2 record in the round matched that of Czechoslovakia, and the Soviets finished with only a bronze medal.
Read more about this topic: Soviet Union National Basketball Team