[7] In the final bout she won a unanimous decision against Nathalie Visschers[8] to become the WKN (World Kickboxing Network) European Champion.
[9][10][11][12] In her next fight, during Cavalaire Kickboxing Show 2, she won a unanimous decision against Sara Surrel to win the FFKMDA French title.
[15] In February 2018, Kalachnikoff entered the fifth edition of the Girl Power tournament, fighting for the WKN Bantamweight title.
She defeated Monika Babić in the quarter-final[16] and won the rematch against Tereza Dvorakova in the semi-finals, but lost to Irem Akim in the final match[17][18] In June 2018, Kalachnikoff fought Teodora Manić for the WAKO kickboxing world welterweight title.
[23][24] In December 2019, she fought Sarel de Jong in a super fight between the reigning Enfusion and WAKO champions,[25] as a replacement for Amel Dehby.