He lacks outright power to produce a lot of aces, but he has excellent spin on his serve, allowing him to force his opponents off the court which leads to him taking the offensive at the beginning of the point.

In August, he would win his first title at the Swiss Open in Gstaad after reaching the main draw through qualification and going on to beat local hope and former world No.

4 Nicolas Kiefer, two-time Swiss Open runner-up Igor Andreev, and first-time finalist Andreas Beck in straight sets.

Going to the Latin America clay tournaments, on 2010 Movistar Open, at Chile, Bellucci defeated defending champion Fernando González in the semifinals and Juan Mónaco in the final match to capture his second tour title.

In the 2010 Sony Ericsson Open he upset James Blake and Olivier Rochus but lost a hard-fought three-set match to Nicolás Almagro.

At the ATP 500 Barcelona he reached the quarterfinals, losing to David Ferrer, after defeating Jarkko Nieminen, Victor Hănescu and Guillermo García López.

Bellucci suffered a third-round loss in Wimbledon to Robin Söderling,[7] and lost a marathon quarterfinal at ATP 500 event in Hamburg to Seppi.

[8] At the US Open, Thomaz started promisingly, beating American Tim Smyczek in straight sets, however, after a grueling 3h51m battle with South African Kevin Anderson, he succumbed in a fifth-set tiebreaker.

After reaching the quarterfinals in Auckland to start off the year, and losing a heartbreaking five set match to Jan Hernych in the second round at the 2011 Australian Open, Bellucci went through a relatively poor run of form.

He then reached the quarterfinals at his hometown 2011 Brasil Open but played poorly and lost to eventual finalist Juan Ignacio Chela.

Bellucci started playing better at the Madrid Open, managing to claim solid wins over Pablo Andújar and Florian Mayer, who retired due to fatigue.

He then went to Indian Wells, where he managed to beat seed 20 Jürgen Melzer and walked over Russian Nikolay Davydenko to equalize his second best ever Masters 1000 campaign, reaching the fourth and losing to Roger Federer in three sets.

After a few months without many significant results, including an elimination to Nadal in Wimbledon, he reached the semifinals at the Stuttgart Open losing to eventual champion and World Number 8 Janko Tipsarević in three sets.

After an early first-round loss to Blaž Kavčič at the 2013 Australian Open, Bellucci got to the quarterfinals in doubles, with partner Benoît Paire, losing to Marcel Granollers and Marc López.

In October/November he disputed two challengers: the first he won the title in Montevideo against Diego Sebastián Schwartzman and in the second, in Bogotá, he felt pain in the abdomen in the middle of the championship match, retiring to the victory of Víctor Estrella and ended the year as the number 125 of the world.

Bellucci began the year qualifying for 2014 Australian Open, in which he won in the first round against German Julian Reister and lost in second to world no.

The Brazilian lost in the Q1 of Buenos Aires and followed with a quarterfinal campaign at the inaugural Rio Open losing to 3rd ranked David Ferrer after winning the first set.

Lost three matches in a row, respectively at Miami, Monte Carlo and Bucharest until he passed the quali in Munich and got as far as the quarterfinal stage, losing to 15th ranked Fabio Fognini.

Lost in 2nd round of Marburg Challenger to Swiss Henri Laaksonen and Q1 of Wimbledon to aussie and former junior number 1, Luke Saville.

As a lucky loser, reached the 2nd round in Hamburg, but lost to Spaniard Pablo Andújar and followed with a quarterfinal showing at Gstaad losing to Juan Mónaco.

4 ranked, Stan Wawrinka in the second round after giving a good fight to the grand slam champion, winning the third set and being a break up in the fourth before losing by 3–6, 4–6, 6–3, 6–7.

In the Davis Cup play-offs, Bellucci was a key component of a stunning victory[11][12] of Brazil over Spain in the clay courts of São Paulo.

After the match Thomaz fell to his knees, crying, as the same crowd that booed him one year earlier, applauded as their hero[13] consolidated this historic win.

Bellucci reached the quarterfinal stage at Vienna after defeating third seed Feliciano López and again at Valencia after winning over Mikhail Youzhny and Bautista Agut.

Bellucci began the year by losing in the first round of Auckland to Jiří Veselý and had the same result at the Australian Open, despite taking a set from world no.

Lost seven matches in a row (São Paulo, Rio, Buenos Aires, Davis Cup, Indian Wells and Irving) respectively to Martin Kližan, Rafael Nadal, Paolo Lorenzi, Leonardo Mayer, Federico Delbonis, Simone Bolelli and Sergiy Stakhovsky.

Returned to victory ways at the Miami Open, the Brazilian beat Lleyton Hewitt and seeded player Pablo Cuevas to reach the third round, after which he was beaten by Alexandr Dolgopolov.

Qualified for the Madrid Masters, after taking down Michael Berrer and Federico Delbonis, and on the main draw beat 32 seed Jérémy Chardy and lost a hard-fought match to 18th-ranked John Isner (6–7, 7–6, 1–6).

In May, he won his fourth tournament at the Geneva Open, beating en route to the title Marcos Bahgdatis, Denis Istomin, Albert Ramos Viñolas, Santiago Giraldo and João Sousa, to lift his fourth world tour level trophy and get back to the Top 40 players in the world after two years.

In May, in Internazionali BNL d'Italia after beating Gaël Monfils (6–3, 7–6) and Nicolas Mahut (6–4, 6–3), Bellucci won a historic first set against #1 Novak Djokovic with a 6–0 in 24 minutes.