Alessio Romagnoli (born 12 January 1995) is an Italian professional footballer who plays as a centre-back for Serie A club Lazio and the Italy national team.

A product of Roma's youth academy, Romagnoli was included in the first team squad by new head coach Zdeněk Zeman at age 17.

[21] Following Leonardo Bonucci's return to Juventus, Romagnoli was appointed as Milan's team captain a few months after he renewed his contract on 5 June 2018.

[27] In his sixth season for Milan, Romagnoli had a string of minor injuries and a series of poor performances, causing him to unexpectedly lose his place in the starting 11 to Fikayo Tomori, a loanee who arrived from Chelsea during the winter transfer window.

Rarely playing in the second half of season, he made just 22 appearances in Serie A, scoring one goal on 29 November 2020 in a 2–0 home win over Fiorentina.

[28] Following the sub-par season, Romagnoli was not called up by the national team coach Roberto Mancini to join the provisional squad for UEFA Euro 2020 (competition postponed for a year due to the pandemic) and was also rumored to have been placed on a transfer market due to the expiration of his contract in June 2022[29] and unwillingness of the club management to deal with agent Mino Raiola, who had convinced the team's goalkeeper Gianluigi Donnarumma to leave the club as a free agent.

[31] On 9 February 2022, against Lazio in the Coppa Italia, he assisted the opening goal in an eventual 4–0 win, a long pass through the field to his teammate Leao.

[citation needed] With the Italy under-21, Romagnoli took part at the 2015 UEFA European Under-21 Championship, forming an effective partnership with fellow centre-back Daniele Rugani.

[41][42][43] Romagnoli is effective in the air and known for his ability to time his challenges;[44] regarded as one of the most promising young Italian defenders of his generation, his precocious displays, technique, positional sense, decision-making, and tackling abilities have led pundits to compare him with legendary Italian defender Alessandro Nesta, whom Romagnoli has described as his footballing idol.