She also competed at world championships, including at the 2015 World Rhythmic Gymnastics Championships where she won a silver and a bronze medal.

[1] Naydenova was member of the Bulgarian group that competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil.

(Together with Lyubomira Kazanova, Mihaela Maevska, Reneta Kamberova, Hristiana Todorova), they won the Group All-around bronze medal.

They dedicated their medal to their teammate Tsvetelina Stoyanova, whom attempted to commit suicide and fell from her apartment in Sofia.

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