He attended a scientific high school in Pesaro for two years before moving in September 2019 to the Federal Technical Center in Tirrenia, where he was coached by Claudio Galoppini, balancing sports with studies.

He enjoys soccer and padel, supports Napoli thanks to his father, and idolizes tennis players Roger Federer and Novak Djokovic.

Nardi made his ATP main draw debut at the 2020 European Open in singles, where he lost to Marcos Giron in three sets, and in doubles partnering Zane Khan.

[citation needed] He received a wildcard for the main draw at the Italian Open,[12] where he lost in the first round to David Goffin in three sets.

[13] In August 2023, he won his fourth Challenger title in Porto, defeating Portuguese João Sousa in the final and reached a career high ranking of No.

[citation needed] In October 2023, he received a wildcard for the main draw of the 2023 European Open but lost to Dominic Thiem in the first round.

123 at the 2024 BNP Paribas Open he replaced as a lucky loser, 30th seed Tomás Martín Etcheverry directly into the second round.

[22][23] Nardi passed first round at home Masters 1000 event in Rome, where he beat Daniel Altmaier,[24] before losing to 10th seed Holger Rune.

[25] Nardi made his Grand Slam tournament debut at the 2024 French Open, but lost in the first round to Alexandre Müller.