The timing of this development is notable, as Casemiro's performances have declined in recent weeks. In a recent match, he was outshone by Crystal Palace's midfielder Adam Wharton. Wharton remains on Manchester United's long-term radar, but it's unlikely the club will be able to sign him before the summer.

Manchester United is also interested in other Premier League targets, including Elliot Anderson and Carlos Baleba. The potential availability of Atalanta's midfielder in the middle of the season makes the situation even more intriguing.

Manchester United is not in a hurry to finalize Casemiro's contract situation. His current deal expires at the end of the season, and the club is unlikely to offer him a similar contract. Instead, any offer would be on reduced wages. It's possible that Casemiro leaves Manchester United as he is expected to receive new proposals in January.

The club has not ruled out keeping Casemiro beyond this season, but it's clear that they are exploring other options. The situation is complex, and it remains to be seen how it will unfold.