Borisova/Sopot made their international debut competing in the 2015–16 Junior Grand Prix (JGP) series.

[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).

Ranked second in the short program and first in the free skate, they won the gold by a margin of 2.53 points over Dušková/Bidař.

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.