(someone's) challenge is (someone's) opportunity

Translations
чей-то вызов — это чья-то возможность
His challenge is her opportunity to demonstrate her skills.
Его вызов — это её возможность продемонстрировать свои навыки.
Definitions
This phrase means that a difficulty or problem faced by one person can be seen as a chance for success or advantage by another person. It highlights how situations that are obstacles for some can create openings or benefits for others.
Words
someone

pronoun
кто то
s
принадлежность
challenge

noun
вызов
is

functional word
есть
someone

pronoun
кто то
s
принадлежность
opportunity

noun
возможность