That is just a rumour, no way Manchester United are letting Casemiro go, he is one of the reasons the team has kept a lot of clean sheets this season, he has been a very important part of the team, he is certainly going to be part of the team for next season and even if he did move, no way Bayern is paying that amount of money for a 31-year-old with only one and a half years left on his contract. And Gavi isn't getting any professional contracts unless he stays at the Academy for another two years or moves as a free agent in the summer, or has the law changed?
IDK, why people are not even reading the latest confirmation from united if the club is not even having intention to sell him in summer. Casemiro has become a very important part for manchester united. People kept linked him to the bayern while manchester united has told us if club has no intention even to put the price tag for him.
"But today, this was the Casemiro we have seen almost all season, and he brings so much in organisation and composure and determination.
"His leadership is then so important for us because others go with him. He is an example."
https://www.manutd.com/en/news/detail/casemiro-back-to-his-best-against-aston-villa-according-to-erik-ten-hagThat proves how important casemiro for MU. It's better for bayern to stick into another player.