Damiano Tommasi (born May 17, 1974 in Negrar, Province of Verona) started his career playing for Hellas Verona in Serie B. He made his first division debut on September 7, 1996, with A.S. Roma, a 3–1 win over Piacenza Calcio, and would be an instrumental figure in the capital side's 2001 scudetto conquest.
Tommasi played for the Italian U21s that won the 1996 European Championship, also being picked for the 1996 Olympic Games in Atlanta. He made his first senior side appearance for the Azzurri on November 18, 1998, against Spain, but did not become a regular until 2001. He played in all four of Italy's matches at the 2002 FIFA World Cup.
During a summer friendly match against Stoke City in 2004, Tommasi suffered a horrible knee injury, and was out of action for a long time. In the summer of 2005 he accepted a one-year contract extension, with youth player wages (€1500 a month) - a contract which, astonishingly, Tommasi instigated himself in the name of fairness. On October 30, 2005, he finally returned to play, entering on the second-half in place of Olivier Dacourt, during a league match against Ascoli Calcio 1898, being even hailed with a long standing ovation by the Roma supporters.
On November 27, 2005, Tommasi scored after just two minutes, in an eventual 1–1 home tie against ACF Fiorentina, being an important first team member as Roma finished runner-up.
After 10 years at Roma, in July 2006, Tommasi joined Levante UD, spending two seasons with the La Liga strugglers, which eventually got relegated in 2007–08.
On September 10, 2008, Tommasi agreed a one-year deal with English second division team Queens Park Rangers. On Friday, January 9, 2009 his contract was terminated by mutual consent.
Tommasi confirmed to be in advanced talks with Chinese League's Tianjin Teda on February 2009, citing an interest in a third experience abroad as the main reason for it. On the 10th the move was confirmed.
After one season, Tommasi left Teda and decided to return to Italy, joining amateurs (Seconda Categoria) club Sant'Anna d'Alfaedo, where he played as a defensive midfielder alongside his two brothers. He made his debut with the team on December 13, 2009.
In May 2011, Tommasi was elected new Chairman of the Italian players' union (AIC), after the retirement of the historical president Sergio Campana who has worked 43 years for the Union.