The Ex-Real Madrid midfield maestro and Brazilian international only moved to Old Trafford in the summer of 2022, with a £70 million ($87m) switch taking him away from Real Madrid after nine memorable years in Spain.
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The 31-year-old has quickly become a talismanic presence for United, despite serving two suspensions after collecting a couple of red cards.
The Premier League heavyweight, Manchester United would be reluctant to part with an integral part of their future plans, but kicker claims that Casemiro is registering on the recruitment radar at Bayern.
It is claimed that former Chelsea boss Tuchel is eager to return to England for reinforcements in the next window.
Bayern are said to be making the addition of another No. 6 a top priority on the transfer front, with greater assistance required for Joshua Kimmich in the middle of the park.
Bayern are aware that it will be difficult to prise Casemiro away from Manchester, meaning that their attention may have to turn elsewhere.
Meanwhile, Manchester United are really enjoying the work Casemiro is doing at their midfield.