Ruan Tressoldi Netto (born 7 June 1999) is a Brazilian professional footballer who plays as a centre-back for Atlético Mineiro. He began his career at Grêmio, making his professional debut in a 4–3 loss to Atlético Mineiro in December 2017, and helped the club win the Recopa Sudamericana in 2018 and the Campeonato Gaúcho in 2018 and 2021. In August 2021, he signed for Italian Serie A club Sassuolo for a reported €5 million, but remained on loan at Grêmio until the end of that year. After his time in Italy, he returned to Brazil on loan, joining São Paulo in August 2024 and then moving to Atlético Mineiro in August 2025, with both deals including options to buy. Interestingly, his twin brother, Ramon Tressoldi, is also a professional footballer in Brazil.