Avaí, one of the leaders of Série B in Brazil, triggered the release clause of Cassiano's contract. Cassiano, one of the captains and highest-paid players at Estoril, wanted to leave and received an offer that matched the stipulated value in his contract, approximately 100,000 euros. Avaí not only paid for his transfer but also offered him a lucrative two-year contract to return to Brazil. The agreement was confirmed by Estoril on their official website and social media, along with a farewell message to Cassiano.