Russia has participated in 10 FIFA World Cups, 7 of which were as the Soviet Union. Their best performance was as the Soviet Union, reaching 4th place in England 1966. Russia's best performance after the dissolution of the Soviet Union was 18th place in the 1994 FIFA World Cup, hosted by the United States of America.
Russia vs South Korea
This was the first time the two countries have played each other in the FIFA World Cup, though they did play a friendly in 2013, which Russia won 2-1. The match ended in a 1-1 draw, with both goals being in the second half.
References
Russia at the FIFA World Cup Wikipedia(Text) CC BY-SA