Diego renewed his loan deal for the 2022 season on 8 December 2021,[5] and was a regular starter during the 2022 Campeonato Gaúcho as his side reached the finals for the first time ever. On 4 April 2022, he moved to Série A side Coritiba on loan until April 2023, with a buyout clause.[6]
Diego made his debut in the top tier of Brazilian football on 29 May 2022, coming on as a late substitute for Guilherme Biro in a 1–0 home win over Botafogo.[7][8]