|Date of birth||20 August 1964|
|Place of birth||Rome, Italy|
|Height||1.77 m (5 ft 9 1⁄2 in)|
* Senior club appearances and goals counted for the domestic league only and correct as of 6 June 2007.
He spent the majority of his 16-year playing career with A.S. Roma, and was regarded by supporters as a club symbol, before his successor in the number-10 shirt and offensive midfield playmaker role, Francesco Totti. He played 47 times for Italy and starred in the teams that reached the semi-finals of the 1988 UEFA European Championship, and subsequently the 1990 FIFA World Cup on home soil.
Throughout his career, Giannini was often referred to as "Il Principe" (The Prince), due to his creative ability, elegance, technique, vision, and passing range, which made him an effective playmaker. In addition to his technical ability and creativity, he was a mobile, versatile, and hard-working player, with notable stamina and tactial awareness, also possessing an accurate shot.
Giannini began his career as a youngster with Almas Roma, a club based in Rome. From a young age he attracted the attention of many of Italy's clubs, eventually signing with Roma ahead of rivals including S.S. Lazio and A.C. Milan. He made his Serie A debut on 31 January 1982 in a 1–0 defeat to A.C. Cesena and went on to make over 400 appearances for the club over the following fifteen years. During his time at Roma, whom he went on to captain, he won the Serie A title once, and the Coppa Italia three times; he also played in the UEFA Cup final during the 1990–91 season, although he did not take part in Roma's run to the 1984 European Cup final.
In 1996 Giannini left Roma to play in Austria for Sturm Graz, with whom he spent just half a season before returning to Italy due to homesickness. Before retiring in 1998 Giannini had brief spells with Napoli and Lecce.
Under manager Azeglio Vicini, Giannini reached the final of the 1986 UEFA European Under-21 Championship with the Italy under-21 side, scoring a goal in first leg of the final against Spain, although Italy would eventually be defeated 3–0 on penalties in the second leg, with Giannini missing one of the spot-kicks in the decisive shoot-out, along with Stefano Desideri and Marco Baroni.
Giannini was capped 47 times for the Italian senior national team between 1986 and 1991, scoring 6 goals. He made his international debut against Malta, at the age of 22, in a European Championship qualifier in December 1986. He went on to represent Italy at both the 1988 European Championships and the 1990 World Cup on home soil under Vicini, reaching the semi-final of both tournaments. He won a 3rd place bronze medal in the 1990 World Cup, scoring a goal in Italy's second group match, which ended in a 1–0 victory over the United States at the Stadio Olimpico in Rome; he was also named part of the Team of the Tournament at Euro 1988. Giannini's final appearance for his country came on 12 October 1991 against the Soviet Union. He was often referred to as "Il Principe" (The Prince) by Italian sports journalists during his playing career, a reference to his grace on the pitch.
Giannini has worked as a match analyst for RAI following his retirement; he also served as the manager of Serie C1 club Foggia from July 2003 to January 2005, when he was sacked. He started the season 2005–06 at the helm of Serie C1 side Sambenedettese, but was fired on February 2006. Later that year, Giannini then served as coach of Romanian side Argeş Piteşti, but was axed in October after nine consecutive defeats, and replaced by Dorinel Munteanu. On September 2007 he was unveiled as new manager of Massese, another Serie C1 club, being however sacked on February 2008 following disagreements with the board.
On July 2008 he was unveiled as new head coach of Lega Pro Prima Divisione team Gallipoli. In his first season in Salento, Giannini guided Gallipoli to triumph in the league, thus winning a historical first promotion in Serie B for the club. A few days later, however, Giannini and Gallipoli announced to have parted company, also because of financial issues involving the club and some rumoured interest for Giannini from other clubs. Nevertheless, Giannini was then confirmed as coach by new Gallipoli owner D'Odorico.
Despite an impressive first half of season with Gallipoli, who was hailed as one of the main league surprises, Giannini resigned from his managerial post on 8 February 2010 following a 2–2 home draw to Grosseto characterized by the team players stopping for 40 seconds and turning faces towards the stadium stands as a form of protest for not having been paid any monthly salaries since October 2009. At the end of the first half, Giannini was sent off due to protests, and reached the stands in the second half, where he heatedly confronted with chairman D'Odorico and announced his resignation, together with all members of his coaching staff, immediately after the end of the game. However, Giannini withdrew his resignation only two days later following a conciliatory meeting with D'Odorico.
After a string of unimpressive results, Giannini stepped down again on 22 March together with his aides Roberto Corti, Fabrizio Carafa and Franco Mandarino, defining his resignations as "irrevocable".
On 30 October 2011 he was appointed head coach of Serie B club Grosseto. He left his post later on 3 December, after a 2–1 win at Pescara (the third consecutive away win during his stint as Grosseto boss), citing his strained relationship with chairman Piero Camilli as the main reason behind his choice. On 6 July 2013, Giannini was officially appointed as the manager of the Lebanese National Team by the helps from Manchester City manager and his friend Roberto Mancini, where he will try to continue the historic success of Lebanon after they reached the final round of qualification for the 2014 World Cup in Brazil.
He started his career during the 2015 AFC Asian Cup qualification. Under his management, Lebanon draw twice against Kuwait. He made everyone suspected on his talents after his team lost 1–4 to Iran in Beirut, even he said that only 100 spectators cheer for Lebanon in Camille Chamoun Stadium. But he almost made Lebanese dream come true after his team slaughtered Thailand a 5–2 win right in Bangkok, and if they had not been suffered a goal down from Adisak Kraisorn with China's penalty goal, Lebanon would have been in Australia.
His most memorable match was against Olympic Brazil which his talent was proven by two goals led by Mohammed Ghaddar and Hassan Maatouk after Ademilson took the lead for Brazil. His team drew 2–2 because of an offside goal from Vinícius Araújo.
1Domestic cups include the Coppa Italia and Austrian Cup
2European competitions include the European Cup, Cup Winners' Cup and UEFA Cup
3Other tournaments include the Supercoppa Italiana and Austrian Supercup
- Sturm Graz
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- "Gli azzurri centrano a Bari l'obiettivo del terzo posto e concludono il Mondiale senza sconfitte. Due gol per una squadra che aveva ancora voglia di correre. Schillaci segna su rigore ed è capocannoniere L'Italia non s'è persa" (in Italian). Retrieved 4 June 2015.
- "Un lampo del giocatore della Roma alimenta facili illusioni. La squadra invece si smarrisce e gli avversari crescono Americani ad un passo dal pareggio, Ferri salva sulla linea. Piovono fischi dal pubblico ma la nazionale si qualifica Giannini, poi il buio" (in Italian). Retrieved 4 June 2015.
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- "Primo allenamento di Giannini" (in Italian). U.S. Grosseto F.C. 29 October 2011. Retrieved 29 October 2011.
- "Giannini prima salva la panchina, poi se ne va." (in Italian). US Grosseto FC. 3 December 2011. Retrieved 4 December 2011.
- "Giuseppe Giannini". Eurosport.com. Retrieved 20 December 2015.
- "A.S. Roma Hall of Fame: 2013". A.S. Roma. 22 July 2013. Retrieved 4 June 2015.
- "Onoreficenze". quirinale.it (in Italian). 30 September 1991. Retrieved 19 March 2015.