Explanation:

Russia won the Davis Cup title in 2021 by defeating Croatia, after a brilliant performance from Daniil Medvedev. The 25-year-old player defeated Marin Cilic in the second singles match, to make the country win its first Davis Cup title since 2006.
It was also the fifth consecutive straight-set victory in the Davis Cup for the No. 2 Medvedev. Russia’s first Davis Cup title was in 2002. Croatia also was seeking its third title after title wins in 2005 and 2008.