Unione Sportiva Livorno 1915, is a semi-professional Italian football club based in Livorno, Tuscany. They compete in Serie D, the top tier of semi-professional Italian football after their promotion from the regional Eccellenza Tuscany league. The team's colours are dark red. Livorno were one of the original sides of Serie A, the top flight of Italian football, but have been relegated seven times from the top flight and have undergone two club refoundings in 1991 and 2021, necessitating a rise from the regional Eccellenza leagues. Their longest spells in the top division were from 1940 to 1949 and from 2004 to 2008. The amaranto have won Serie B on two occasions, the Lega Pro Prima Divisione and Lega Pro Seconda Divisione once each, and the Supercoppa di Serie C once as well. Livorno play their home matches at the Stadio Armando Picchi.

The Serie A, officially known as Serie A TIM for sponsorship reasons, is a professional league competition for football clubs located at the top of the Italian football league system. The winners are awarded the Coppa Campioni d'Italia trophy and the scudetto, a decoration that they wear on the jersey the season after the victory. It has been operating as a round-robin tournament for over ninety years since the 1929–30 season. It had been organized by the Direttorio Divisioni Superiori until 1943, the Lega Calcio until 2010, and the Lega Serie A ever since. Serie A is regarded as one of the best football leagues in the world and it is often depicted as the most tactical and defensively sound national league. Serie A was the world's strongest national league in 2020 according to IFFHS, and is ranked second among European leagues according to UEFA's league coefficient – behind the Premier League, and ahead of La Liga, Bundesliga and Ligue 1 – which is based on the performance of Italian clubs in the Champions League and the Europa League during the previous five years. Serie A led the UEFA ranking from 1986 to 1988 and from 1990 to 1999.