 He remained in the team for the league cup final on 20 May, the 6–2 defeat of Marítimo at the Estádio Cidade de Coimbra.Grimaldo's first full season began on 7 August 2016, as he started in a 3–0 win against Braga for the Supertaça Cândido de Oliveira in Aveiro, assisting Franco Cervi for the opening goal.On 2 October he scored his first goal for the club, a free kick to conclude a 4–0 home triumph over Feirense; on 28 May 2017, he played the full 90 minutes in the final of the Taça de Portugal, won after defeating Vitória de Guimarães 2–1.