Daniil Medvedev has won over 60 matches in 2021, making him the first player to achieve this feat.
Russia defeated Croatia in the final at Madrid to win the Davis Cup title after 15 years.
Alcaraz will make his debut in the competition, and he will be joined by Roberto Bautista Agut, one of the heroes of the 2019 World Cup
Finland will face Russia on Wednesday at the Saint Petersburg stadium after their win against Denmark on Saturday whereas Russia lost 3-0 to Belgium in their previous match.