The question asks to identify the winning nation of the Davis Cup 2021.
Based on the results of the Davis Cup 2021 tournament, the champion nation was Russia.
Therefore, the correct option is Russia.
Which trophy is contested between the England and Scotland teams in the Rugby Six Nations Championship, 2025?
Which of the following teams won the Vijay Hazare Trophy in 2024-25?
Which trophy is presented to the national football team that wins the UEFA European Championship?
Who among the following is the winner of the French Open 2021 Men’s Singles Final?
Which country won the Thomas Cup Badminton championship 2016?
Who among the following was the Australian Open 2020 women’s singles winner?
What was the total number of goals scored in the finals of the FIFA World Cup 2018?
In which of the following cities was the 2020 Asian Wrestling Championships held?