Ruan Tressoldi made his professional debut with Grêmio in a 4–3
Campeonato Brasileiro Série A loss to on 3 December 2017. On 11 August 2021, Ruan Tressoldi signed for Italian
Serie A club
Sassuolo on a deal reportedly worth €5 million; it was also confirmed that he would remain at Grêmio on loan until the end of 2021. On 19 August 2024, Tressoldi was loaned to
São Paulo until 30 June 2025, with an option to buy. On 25 August 2025, Tressoldi joined
Atlético Mineiro on loan until June 2026, on a deal including an option to buy. ==Personal life==