Faatumu le fuaiupu lenei: I le 2018, na faateleina ai e Stefanidi lana aoina o pine, ma maua ai le tulaga tolu (4.80 m) i le World Indoor Championships i Birmingham, ma le tulaga muamua (4.85 m) i le European Championships i Perelini. Na ia manumalo i le
2018 Diamond League series (4.87 m) mo le lona tolu o tausaga sosoo ma faʻamaeʻaina le vaitau ma le tulaga lua (4.85 m) i tua atu o Anzhelika Sidorova, sui o Europa i le Continental Cup.