Nina Polikarpova/Kamil Karimov (Irkutsk, RUS) lost 7-6 to Aleksandra Stoyarosova/Ivan Kazachkov (Novosibirsk, RUS) in the Final of the Russian Mixed Doubles B-Division Championship, held January 21 - 25, 2021 in Sochi, Russia. To advance to the championship game, Polikarpova/Karimov won 9-3 over Arina Rusina/Nikita Shekhirev (Moscow, RUS) in the semifinals of the 2021 Russian Mixed Doubles B-Division Championship in Sochi, Russia; and won 12-0 over Aleksandra Antonova/Vadim Shvedov (St. Petersburg, RUS) in the quarterfinals.
 
Polikarpova/Karimov finished 3-2 in the 0-team qualifying round. . In their opening game, Polikarpova/Karimov lost 8-6 to Ekaterina Glebova/Artem Ruchkin (Sochi, RUS), then responded with a 7-5 win over Rusina/Shekhirev. Polikarpova/Karimov won 7-5 against Olga Antonova/Sergey Varlamov (St. Petersburg, RUS). Polikarpova/Karimov went on to lose 9-8 against Anastasia Sushkova/Bodgan Shestopalov (Tatarstan, RUS). Polikarpova/Karimov responded with a 6-5 win over Stoyarosova/Kazachkov in their final qualifying round match.
 
Polikarpova/Karimov ranks th overall on the Year-to-Date rankings with points earned so far this season.