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.