World number two Daniil Medvedev celebrated the “best weeks” of his career as he led the Russian Tennis Federation to a third Davis Cup title.
Medvedev’s 7-6 (9-7) 6-2 win over Marin Cilic sealed a 2-0 victory over 2018 champions Croatia in the Madrid final.
Andrey Rublev had won the first singles match against Borna Gojo 6-4 7-6 (7-5).
The Davis Cup triumph comes at the end of a season in which Medvedev won his maiden Grand Slam title at the US Open.
The Russians are the fourth nation to win both the Davis Cup and Billie Jean King Cup – the women’s equivalent team competition – in the same year.
Medvedev was initially tested in the first set by 2014 US Open champion Cilic, who had lost three of his four matches coming into the final.
The 33-year-old Croat built up a 4-2 lead in the first-set tie-break, but his forehand lost its way in the closing stages as the Russian steadied his own nerves.
Cilic’s serve deserted him in the early part of the second set, with Medvedev going an early break up and keeping that advantage.