Sead Kolašinac (pronounced [sěad kolaʃîːnats]; born 20 June 1993) is a professional footballer who plays as a centre-back for Serie A club Atalanta.

[4] In August 2014, he suffered a severe knee injury, which was diagnosed as an anterior cruciate ligament tear and was ruled out for at least six months.

[7] He made his official debut for the club in the 2017 FA Community Shield game against Chelsea on 6 August, managed to score a goal and win his first trophy.

[12] In August 2018, Kolašinac picked up a knee injury during a pre-season clash against Chelsea, which ruled him out for the start of the season.

[16] He won his first piece of major silverware with Arsenal on 1 August, by beating Chelsea in the FA Cup final.

[21] Kolašinac appeared in his first encounter of the season in an EFL Cup fixture against West Bromwich Albion on 25 August.

[29] He won his first title with the club on 22 May 2024, by beating Bayer Leverkusen in the UEFA Europa League final.

[35] In June 2014, Kolašinac was named in Bosnia and Herzegovina's squad for the 2014 FIFA World Cup, country's first major competition.

[37] During his career, Kolašinac has been deployed as a centre-back and as a defensive midfielder, although he spent most of the time playing as a left-back.

[39] He is a practising Muslim; together with international teammates Ibrahim Šehić, Muhamed Bešić, Armin Hodžić, Izet Hajrović, Edin Višća and Ervin Zukanović he visited a mosque in Zenica during the national team's concentration.

[40] In July 2019, he and his then teammate Mesut Özil were victims of an attempted carjacking, which Kolašinac successfully fought off.