Junior

Daria Trubnikova was born in Tambov on 1 January 2003. She began training in rhythmic gymnastics at age six. Trubnikova competed at the 2018 Rhythmic Gymnastics European Championships, where she won gold in the clubs and team events.^[5] At the 2018 Summer Youth Olympics, Trubnikova won the rhythmic gymnastics all-around title ahead of Ukrainian gymnast Khrystyna Pohranychna and Italian gymnast Talisa Torretti. It was the third consecutive victory in rhythmic gymnastics at the Youth Olympic Games by a Russian gymnast.^[6]

Senior

At the 2019 Moscow Grand Prix, Trubnikova won the gold all-round medal ahead of Arina Averina, also of Russia. At the 2019 Brno Grand Prix Final, Trubnikova was the gold medallist in the all-around, ahead of Arina Averina and Katrin Taseva. Trubnikova also competed at the 2020 Moscow Grand Prix, where she won the silver all-around medal behind fellow compatriot Dina Averina and ahead of Lala Kramarenko. She also won gold in the clubs final.^[7]

In 2021, she was selected for the Russian national team after placing in the top 8 at the national championships. She won the gold medal ahead of Boryana Kaleyn and Lala Kramarenko in the all-around at the World Cup Baku.^[8] At the same event, she won the silver medal in ball.^[9] In the 2021 Minsk World Challenge Cup, she finished in 5th place in the all-around, behind Nicol Zelikman from Israel. Later that year, Irina Viner announced that Trubnikova, Lala Kramarenko and Ekaterina Selezneva would be the Olympic reserves for Dina and Arina Averina at the Olympic Games in Tokyo 2021. Trubnikova also competed in the Brno Grand Prix, where she took silver in the all-around ahead of Irina Annenkova and behind Lala Kramarenko. She also won the gold in hoop and another silver medal in ribbon. In October she competed in the Cluj Napoca World Cup Challenge, where she won the full bronze behind Boryana Kaleyn and Milena Baldassarri. In the apparatus finals, she obtained bronze in hoop and clubs, silver in ball, and 4th place in ribbon.