2023–2025: Masters wins & fourth round, Win over world No. 1, top 70
Ranked No. 159, he made his debut at the 2023 Monte-Carlo Masters after defeating fourth seed Constant Lestienne and eleventh seed Oscar Otte in the qualifying competition. [9] He won his first round match, recording his first Masters win and only his second on ATP tour-level, over wildcard Valentin Vacherot. He lost by a double bagel to compatriot and 16th seed Lorenzo Musetti in just 50 minutes. Despite the result, he moved more than 15 positions up in the rankings at world No. 143 on 17 April 2023. [10] [11] 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 on his 20th birthday, defeating Portuguese João Sousa in the final. [14] [15] As a result, he equaled his career high ranking of No. 126 on 7 August 2023 [16] and reached a new career-high ranking of world No. 116 three weeks later. [17] 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. [18] He qualified for the 2023 Next Generation ATP Finals. [19]
Ranked No. 123 at the 2024 BNP Paribas Open he replaced as a lucky loser, 30th seed Tomás Martín Etcheverry directly into the second round. [20] He defeated Zhizhen Zhang for his first win at this Masters and reached his first third round at this level. [21] In his next match, he took the first set off world No. 1 Novak Djokovic the first lucky loser to do so at an ATP Masters 1000 event, and the first at an ATP event overall since fellow Italian Lorenzo Sonego in Vienna 2020. [22] He ended up winning that third round match in three sets against the top seed to reach the fourth round for the first time in his career and became the lowest-ranked player ever to defeat Djokovic at a Masters or a Grand Slam. [23] As a result he made his top 100 debut in the rankings. [24] [25]
He won his sixth Challenger title at home soil at the 2024 Tennis Napoli Cup after defeating Pierre-Hugues Herbert in three sets. [26] [27] Nardi passed first round at home Masters 1000 event in Rome, where he beat Daniel Altmaier, [28] before losing to 10th seed Holger Rune. [29] Nardi made his Grand Slam tournament debut at the 2024 French Open, but lost in the first round to Alexandre Müller. [30] In November 2024, Nardi reached the final at the ATP Challenger HPP Open in Helsinki, Finland, losing to Kei Nishikori in the final in three sets. [31]
He was runner-up at the 2025 Koblenz Challenger, losing to Ugo Blanchet in the final which went to a deciding set tiebreak. [32] Again as a lucky loser, Nardi reached the quarterfinals at the ATP 500 2025 Dubai Tennis Championships defeating Zizou Bergs. [33]
Italy 
