In Rocky IV, Rocky fights Ivan Drago in Moscow in the film's final bout.
Rocky travels to the Soviet Union after accepting Drago's challenge following Apollo Creed's death. The fight is staged on Christmas Day before a large Soviet crowd, with Rocky entering an arena that initially appears hostile to him.
The contest is presented as both a personal mission and a symbolic Cold War confrontation. Drago has the advantages of youth, size, scientific testing, and government support, while Rocky trains in a remote rural setting using basic equipment.
During the fight, the crowd gradually responds to Rocky's determination. Even Drago's political supporters begin to recognize his endurance. Rocky wins by knockout and delivers a speech about changing attitudes, reinforcing the movie's broad sports-drama themes.