[4] In Spain, they outscored the Czech Republic's Anna Dušková / Martin Bidař by 9.53 points for the gold medal.

In January 2016, Borisova/Sopot were awarded the bronze medal at the Russian Junior Championships, having finished third to Anastasia Mishina / Vladislav Mirzoev (gold) and Amina Atakhanova / Ilia Spiridonov (silver).

On March 17–21, competing at the 2016 World Junior Championships in Debrecen, Hungary, Borisova/Sopot placed fourth in the short and third in the free, taking the bronze medal overall behind Czech pair skaters Anna Dušková / Martin Bidař and teammates Anastasia Mishina / Vladislav Mirzoev who took the gold and silver medals respectively.

[5] They made their international debut at the 2017–18 JGP event in Minsk, Belarus where they placed 2nd behind teammates Daria Pavliuchenko / Denis Khodykin.

In November 2017 Poluianova/Sopot made their international senior debut at the 2017 CS Tallinn Trophy where they won the bronze medal.

They were ranked 3rd in the short program and 2nd in the free skate and they were part of a Russian sweep of the pairs' podium.