Thiago Seyboth Wild (; born 10 March 2000) is a Brazilian professional tennis player. He won the 2018 US Open junior singles title. He reached a career high ATP singles ranking of No. 106 on 14 September 2020 and a doubles ranking of No. 197 achieved on 22 May 2023. He had a career high ITF junior ranking of No. 8 achieved on 22 January 2018.

Seyboth Wild made his ATP main draw debut at the 2018 Brasil Open after receiving a wildcard into the singles main draw. He won his first Challenger title at Guayaquil defeating Bolivian Hugo Dellien on November 3, 2019. At just 19 years old, he won his first ATP Tour title in Santiago defeating Casper Ruud on 1 March 2020. By winning this title he became the youngest Brazilian ever to win an ATP title. He also became the first player born in the 2000s to win an ATP Tour title.

Career

2018: Junior Grand Slam title
Wild became the second Brazilian to win a junior Grand Slam (US Open) on September 9, joining Tiago Fernandes. He also made the junior semifinal at the Roland Garros, and at the doubles of US Open and French Open.

2019: First Challenger title
In November 2019, at the age of 19, he won his first Challenger in Guayaquil, entering the top 300 in the world for the first time. With the title, he jumped to the 235th place in the world ranking, and became the third best tennis player in Brazil at the moment, behind only Thiago Monteiro and João Menezes.

2020: First ATP title, Top 125 and Major debuts

In February 2020, he received wildcard to participate in the ATP 500 in Rio de Janeiro, where he defeated the Spaniard top 100 Alejandro Davidovich Fokina in three sets (5–7, 7–6 (7–3) and 7–5) in the first round, in the longest match in the history of the tournament (3 hours and 49 minutes). In the next round, he faced world number 32 Borna Ćorić, losing in the third set tiebreak. With this result, he entered the world top 200 for the first time on February 24, moving up to ranking No. 182.

In the following week, invited as a wildcard to the ATP 250 in Santiago, Wild had his best campaign: he defeated Facundo Bagnis, Juan Ignacio Londero (world No. 63) and in the quarterfinals, the top seed of the tournament, and champion of the Rio Open, the Chilean world No. 18 Cristian Garín, who retired after losing the first set in a tiebreak. In the semifinals he defeated Renzo Olivo in straight sets becoming the youngest Brazilian to reach a final at this level, surpassing the achievements of former world No. 1 Gustavo Kuerten, then aged 20, and of Jaime Oncins and Thomaz Bellucci, at 21 years old. He also became the first Brazilian to compete in an ATP level final since Bellucci was runner-up in Houston in April 2017. In the final, he defeated Norwegian Casper Ruud (ranked No. 38 and champion of the Argentina Open two weeks before), in three sets, becoming champion at 19 years old, surpassing Kuerten, who won his first ATP title at the age of 20. Wild was also the youngest tennis player to win a title in the Latin American clay court since Rafael Nadal won Acapulco in 2005, at the age of 18. Wild climbed up 69 positions, reaching a career high ATP singles ranking of No. 113, becoming the second-highest ranked tennis player in Brazil.

In March, Seyboth Wild became the first professional tennis player to announce a diagnosis of COVID-19. He was investigated for an alleged breach of quarantine prior to receiving the test results.

After the season was stopped for a few months due to the COVID-19 pandemic, he made his Major debut at the 2020 US Open (tennis). In September, Seyboth Wild participated in the Challenger 125 in Aix-en-Provence, France, reaching the final.

2023: Maiden doubles final, second Challenger title, first Major and top 10 win 
After two years of having poor results, in March, Wild reached the final of the Challenger in Santiago, losing to Hugo Dellien, and the following week, he won the Challenger in Vina del Mar, defeating top seed Hugo Gaston and returning to the top 230 in the singles rankings on 20 March 2023.

He also reached the doubles final at the 2023 Chile Open partnering Matías Soto. As a result he reached a new career career doubles ranking of No. 230 on 20 March 2023.

On April 30, Wild won the Buenos Aires Challenger in singles and doubles. With that, he returned to the world top 200 in singles, and entered the world top 200 in doubles for the first time.

In May, participating in the Piemonte Open, which is an ATP Challenger Tour 175 event, he reached the quarterfinals losing to the top seed and top-50 player, Argentine Sebastián Báez, in three sets.

Ranked No. 172, Wild qualified for Roland Garros for the first time. He entered the tournament qualifications as one of the lowest ranked players. He won his three matches against Antoine Bellier, Ričardas Berankis and Dominik Koepfer losing only one set.
He upset world No. 2 and second seed Daniil Medvedev in a five-set match to advance to the second round, earning the biggest win of his career. Next he defeated former top 20 Guido Pella to move to the third round of a Major for the first time in his career.  In the 3rd round, facing the n.27 seed of the tournament, the Japanese Yoshihito Nishioka, Wild still opened 2 sets to 1, but succumbed to fatigue (he was already in his sixth match in the tournament), being eliminated by 3 sets to 2. 

Unranked to enter the post-Roland Garros ATP grass tournaments, Wild made his preparation and entered the Wimbledon qualifying tournament, while fighting his private battle to be number 1 in Brazil, against Felipe Meligeni Alves and Thiago Monteiro. He defeated Jelle Sels and Pierre-Hugues Herbert, but in the last round of qualifying, facing Tomás Barrios Vera, at the beginning of the 5th and final set, he suffered a slight sprain in his ankle that cost him his place in Wimbledon. Wild then decided to compete on clay in the Challenger in Karlsruhe, Germany.

After reaching the quarterfinals in Karlsruhe, and the semifinals of the Challenger 125 in Braunschweig, both in Germany, Wild became the number 1 tennis player in Brazil for the first time, surpassing Thiago Monteiro, who spent 5 years in this position.

Personal life
In September 2021, it was revealed that Seyboth Wild was being investigated by Brazilian Civil Police of Rio de Janeiro State for physical and emotional abuse towards ex-girlfriend Thayane Lima, for which he received a restraining order. Seyboth Wild has since denied the charges, and has launched a defamation and extortion attempt lawsuit. Two lawsuits investigating the allegations of domestic and psychological violence and moral damage were filed in April 2023, with the government indicting Wild. A third investigation is currently in progress and runs in secrecy of Justice.

Singles performance timeline

ATP career finals

Singles: 1 (1 title)

Doubles: 1 (1 runner-up)

ATP Challenger Tour and ITF Futures/World Tennis Tour Finals

Singles: 10 (6 titles, 4 runner-ups)

Doubles: 6 (4 titles, 2 runner-ups)

Junior Grand Slam finals

Singles: 1 (1 title)

Record against top 10 players
Seyboth Wild's record against players who have been ranked in the top 10, with those who are active in boldface.  Only ATP Tour main draw and Davis Cup matches are considered:

Wins over top 10 players
He has a  record against players who were, at the time the match was played, ranked in the top 10.

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References

External links
 
 
 

2000 births
21st-century Brazilian people
Brazilian male tennis players
Grand Slam (tennis) champions in boys' singles
Living people
Pan American Games competitors for Brazil
People from Marechal Cândido Rondon
Sportspeople from Paraná (state)
Tennis players at the 2019 Pan American Games
US Open (tennis) junior champions
Brazilian people of German descent