Mattia De Sciglio (Italian pronunciation: [matˈtiːa de ʃˈʃiʎʎo]; born 20 October 1992) is an Italian professional footballer who plays as a right-back.
De Sciglio made his professional debut for Milan in 2011, after several seasons in the club's youth system, and subsequently became a regular in the line-up, being able to play as either right or left back, winning two Supercoppa Italiana titles. He joined Juventus in 2017, winning a domestic double in his first season with the club, followed by two more consecutive Serie A titles and a Supercoppa Italiana.
At international level, De Sciglio made his senior debut for Italy in March 2013 and he was selected in the Italian squads for the 2013 FIFA Confederations Cup, 2014 FIFA World Cup and the UEFA Euro 2016.
A native of Milan, De Sciglio started playing football as a child at the Santa Chiara e San Francesco parish recreation centre in the nearby municipality of Rozzano, before moving to local amateur team Cimiano in 2001.
The following year, aged ten, De Sciglio joined AC Milan's youth system, where he spent nine seasons. In 2010, he was a member of the under-19 squad who won the Coppa Italia Primavera, 25 years after the team's last success in the competition.
At the start of the 2011–12 season De Sciglio was officially included in the first team squad by manager Massimiliano Allegri. He made his professional debut on 28 September 2011, coming on as a substitute in a UEFA Champions League group stage home game against Viktoria Plzeň, which Milan won 2–0. He was given his first start (and second overall appearance) in a 2–2 away draw against the same team on 6 December. Four months later, on 10 April, De Sciglio also made his league debut, playing as a starter in a 1–0 away win over Chievo. The following month, on 6 May, he played in his first Milan derby against city rivals Inter, replacing an injured Daniele Bonera midway through the first half of a 4–2 loss.
As from the 2012–13 season De Sciglio was assigned the number 2 shirt, which he called "very important" as in the past it was worn "by great players like Mauro Tassotti and Cafu", adding that he hoped to "live up to their standards". Throughout the season, De Sciglio became a regular in the starting line-up thanks to a series of convincing performances. He made 33 appearances in the 2012–13 season, managing three assists in the process. He played as both a left back and right back, showing competence on either flank.
The 2013–14 season was a frustrating one for De Sciglio. He missed 20 matches in total due to various injuries which limited him to making just 21 appearances for the season in all competitions. On 18 May, De Sciglio was sent off in Milan's game against Sassuolo. De Sciglio healed in time to participate with his national side Italy in the 2014 FIFA World Cup in Brazil.
De Sciglio made 18 appearances for Milan in the 2014–15 season as he struggled with injury and vied with Ignazio Abate for the starting right-back spot. Towards the end of the season, however, he started to fall into Filippo Inzaghi's favor and began to start most games. Despite this, he also received criticism due to a perceived lack of discipline, particularly citing the 3–0 loss to Napoli on 3 May, where De Sciglio conceded a penalty (saved by Diego López) and was sent off in the first minute of the match for a foul in the penalty area.
Inzaghi's replacement as coach, Siniša Mihajlović, has firmly established De Sciglio in the right-back position, having started him in almost every game this season, mostly replacing Abate on the right-back but also playing in place of the injured left-back Luca Antonelli. On 6 March 2016, De Sciglio made his 100th Milan appearance, being given the captain's armband to mark the occasion, in a 2–0 away loss to Sassuolo.
Following impressive performances at UEFA Euro 2016, it was reported that Milan had rejected a €15 million offer from Napoli.
Under the new Milan manager Vincenzo Montella, De Sciglio started almost every match, mostly as a left-back. On 23 December 2016, he started the match against Juventus in the Supercoppa Italiana, which Milan went on to win 4–3 in a penalty shoot-out, with De Sciglio winning his second Supercoppa Italiana title.
On 20 July 2017, De Sciglio joined Juventus for €12 million on a five-year contract. On 13 August, he made his club debut, coming on as a substitute in a 3–2 defeat to Lazio in the 2017 Supercoppa Italiana.
On 26 November, De Sciglio scored his first ever goal, in a 3–0 home win over Crotone. After struggling in his later seasons at Milan to replicate the promising performances he had shown in his early years at the club, De Sciglio's form improved significantly after his move to Juventus, and his consistent defensive performances drew praise in the media.
De Sciglio missed the first part of the 2018–19 season after picking up an injury during the pre-season. He returned to action on 27 October 2018, in a 2–1 away win over Empoli in Serie A.
On 9 January 2022, De Sciglio scored the winning goal in a 4–3 win against Roma, and scored his second league goal of his career. On 16 June, Juventus announced De Sciglio had renewed his contract until 30 June 2025.
On 5 October 2020, De Sciglio was signed by Lyon on a season-long loan.
On 29 August 2024, De Sciglio was signed on a one-year loan by Empoli.