Thiago Agustín Tirante (born 10 April 2001) is an Argentine professional tennis player. He has a career-high ATP singles ranking of world No. 50 achieved on 10 August 2026 and a career-high doubles ranking of No. 225 achieved on 20 July 2026.
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Junior career
In June 2019, Tirante won the boys' doubles title at the French Open with Brazilian Matheus Pucinelli de Almeida. Later that season, he earned the boys' singles trophy at the prestigious Orange Bowl.
Tirante had good results on the ITF Junior Circuit, maintaining a 130–57 singles win-loss record. He was named the 2019 world junior champion by the ITF and was the second Argentine to finish the season as world No. 1 in the junior rankings, after Axel Geller.
Professional career
2021: ATP debut and maiden ATP Challenger title
In March, he made his ATP Tour main draw debut at the 2021 Argentina Open. In September 2021, he won his maiden Challenger title at the 2021 Ambato La Gran Ciudad in Ecuador.
2023–2026: Major debut and first wins, top 50
Tirante reached the final of the 2023 Mexico City Open, where he lost to German Dominik Koepfer. In May of that year, he entered the top 150 for the first time, following his second Challenger title at the 2023 Morelos Open, defeating Australian James Duckworth in the final.
Ranked No. 153, he made his slam main draw debut at the 2023 French Open, defeating Swiss Dominic Stricker in the last round of qualifying. Tirante recorded his first Grand Slam win over 25th seed Botic van de Zandschulp. He lost to Zhang Zhizhen in the second round.
In August he played at the 2023 Los Cabos Open, Mexico, and recorded first win at an ATP event over qualifier Gonzalo Lama. He won his third Challenger at the 2023 Open Bogotá over Gustavo Heide and reached a new career-high ranking of No. 111 on 2 October 2023. At the same tournament, he also won the doubles title with countryman Renzo Olivo.
At the 2024 Córdoba Open, Tirante reached the main draw as a lucky loser and recorded his third ATP win over an ATP debutant, wildcard Francisco Comesaña. He played the qualifying at the 2024 Rio Open, but lost to Italian Andrea Pellegrino. Despite the loss, he reached the top 100 on 26 February 2024.
Later that month, Tirante made an appearance at the 2024 Chile Open, where he defeated Brazilian prospect João Fonseca in straight sets. He lost to qualifier Corentin Moutet in the second round.
Tirante won his fourth Challenger at the 2024 Mexico City Open without dropping a set and reached a best singles ranking of world No. 91 on 8 April 2024.
In July, Tirante reached his first ATP Tour semifinal at the 2024 Swedish Open, after a run which included wins over top seed and defending champion, Andrey Rublev, his first top 10 win, and Roberto Carballés Baena in the quarterfinals, before losing to eventual champion Nuno Borges.
Coaching
Tirante hired Javier Nalbandian to be his coach in June 2022. Dante Gennaro replaced Nalbandian starting in September 2024 and during the 2025 United Cup, where Titante made his debut as the No. 2 Argentine singles player.
Performance timeline
Singles
Current through the 2026 Canadian Open.
ATP Challenger Tour finals
ITF Tour finals
Junior Grand Slam finals
Wins over top 10 players
Tirante's has a 4–1 (80.0%) record against players who were, at the time the match was played, ranked in the top 10.
*As of 15 August 2026
Awards
2019
ITF Junior World Champion