Acellas was raised in the youth system of Cagliari and then Cremonese.
On 20 July 2021, Acella joined Giana Erminio in Serie C on a season-long loan.[3] He made his senior debut at the club and played most of the season as the starter.
Upon his return from loan, Acella made his debut for the senior squad of Cremonese on 8 August 2022 in a Coppa Italia game against Ternana.[4] He made his Serie A debut for the club on 12 February 2023 against Napoli.[5]
On 21 August 2023, Acella joined Perugia on a season-long loan.[6]
On 23 January 2024, Acella returned on a new loan to Giana Erminio. On 24 July 2024, he was loaned to Giugliano.[7]
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