Czech Republic vs. Slovakia vs. Russia

The grudge: The Czech Republic and Slovakia split, albeit amicably, in 1993. Russia cut oil supplies to the Czech Republic in July—ostensibly for technical reasons—but many analysts suspect it was due to a missile defense deal with the United States.

The competitors: The three countries met in the men’s double canoe final on Aug. 15.

The result: Slovakia won the gold, the Czech Republic earned silver, and Russia took bronze.