A report from journalist Ekrem Konur on the social network X states that Matías Viña is transferring to River Plate. The report also indicates the Argentine club will announce the transfer within two to three days.

According to ESPN, Matías Viña gives preference to River Plate in the negotiation for his departure from Flamengo. The source also reported that River Plate is targeting the Uruguayan player. Negotiations for Viña's move to Argentina are ongoing, and there is optimism among the parties for a positive outcome. Matías Viña is aware he will not have space at Flamengo due to competition for his position and has received approval from José Boto to leave the club. Viña, who was rarely used in 2025 and spent much time injured, is now fully fit and could be used immediately by Marcelo Gallardo if acquired by River Plate.

River Plate has identified Matías Viña as a new target and has initiated contact with Flamengo after previous negotiations for a left-back were not successful. The Argentine club's proposal for the 28-year-old Uruguayan defender is a one-year loan with an option to buy. The club views him as an experienced player who can strengthen a priority area. It is reported that Viña is interested in a move to find a more central role and consistent playing time. He has made only 10 appearances in 2025 for Flamengo, where he is behind Alex Sandro and Ayrton Lucas. Flamengo's management is cautious and does not appear willing to facilitate Viña's departure, even though he is not considered a key player. Viña has 43 caps for Uruguay. He joined Flamengo in January 2024 and his contract runs until the end of 2028. Spartak Moskva has also shown interest. In December 2025, it was reported that the Russian club had two offers of €3 million and €4 million rejected. Flamengo's asking price was said to be €6 million. Flamengo originally signed Viña from AS Roma for a fee of €8.1 million.