Having begun his career at Bologna, he then moved to Cagliari and gained experience with a loan to Varese. Capello has represented Italy at youth international levels up to the under-19 team.
Born in Bologna, Capello began his career at hometown club Bologna F.C. 1909. He made his debut on 28 November 2012 in the fourth round of the Coppa Italia, a 1–0 win over Livorno at the Stadio Renato Dall'Ara, replacing Luca Veratti for the final 14 minutes of the game.[2] Aged 16, it was his only appearance for the club.
On 2 July 2014, Capello moved to Cagliari for €4 million from Bologna (€1 million cash plus defender Marios Oikonomou).[7][8][9] Having been an unused substitute in 14 Serie A matches and one cup match, he made his debut for the Sardinian club on 14 January 2015 in the last 16 of the season's cup, a 2–1 loss at Parma. He was substituted after 56 minutes for Marco Sau, who scored Cagliari's goal.[10]
Capello was loaned to Serie B club Varese for the remainder of the season on 2 February 2015.[11][12] More often an unused substitute, he made four appearances for the team from Lombardy, of which only one was a start: a 1–0 defeat at Crotone on 10 May, in which he was replaced by Luca Miracoli with 15 minutes remaining.[13]
On 31 August 2015, Capello left for Lega Pro club Prato in a temporary deal.[14][15] Capello's number 16 shirt[16] was also taken by youngster Davide Arras.
On 25 July 2016, Capello was signed by Olbia.[17] The club also signed some youth products from Cagliari.
On 12 July 2017, Capello joined Padova on loan.[18]
Capello made his international debut for Italy under-17 in a 1–0 defeat away to Israel on 14 September 2011. He earned seven caps in total for that category, and went on to earn one for the under-18 team and two for the under-19 team in the following years.[22][23]
Described as a promising, modern, and dynamic forward, Capello is capable of playing anywhere along the front-line, and has been used both as a striker, and as a winger.[6] A talented player, his main attributes are his technique, dribbling skills, and his striking ability from outside the area.[6]
^"Primavera, Alessandro Capello è dell'Inter" [Primavera, Alessandro Capello belongs to Inter] (Press release) (in Italian). F.C. Internazionale Milano. 5 July 2013. Retrieved 26 August 2015.
^"Colpo a segno: Capello arriva a Varese" [Done deal: Capello arrives at Varese] (in Italian). La Provincia editoriale di Varese. 2 February 2015. Retrieved 19 August 2015.