Following the cancellation of the Eurovision Song Contest 2020, Hardy was invited to participate in a songwriting camp in Zürich to help write a new song for the Swiss representative Gjon's Tears for the 2021 edition. Together with Gjon's Tears and the Belgian songwriter Nina Sampermans, he wrote the song "Ground Zero", which was later translated into French as "Tout l'univers". Out of five finalists, a professional jury ultimately chose this song to represent Switzerland in the Eurovision Song Contest 2021. At Eurovision, the entry finished in third place with 432 points: Switzerland's best placement since 1993.