According to sources within Manchester United, renewing the contract of 32-year-old veteran Harry Maguire has become the club's primary focus. Comparatively, Casemiro, who is a year older, is more likely to leave on a free transfer after his contract ends.

Maguire has outstanding leadership qualities and is willing to serve as a substitute; he has also accepted a pay cut. The English defender currently earns £190,000 weekly, and reducing his wages to under £150,000 should not pose much difficulty. United may sign a new center-back next summer, but Maguire's role remains significant.
For example, in the match against Everton, if Maguire had played, he would have helped not only in aerial defensive duels but also could have filled in as a striker when chasing an equalizer! Data shows that Everton forward Thierry Barrie won 14 aerial duels in that game, setting a Premier League record for the most aerial duels won by a player in a single match this season. Had Maguire been on the field, such a scenario might not have occurred.
Lenny Joro is a highly promising future star, but he lacked aggression in the Everton match, even being dribbled past to concede the winning goal. In such games, Maguire is the better choice because Everton is a traditionally physical English team with a clear advantage in aerial battles. Several Premier League teams share this style, where Maguire proves very useful.
Set pieces have become increasingly important in the Premier League over the past two seasons, so losing the "aerial boss" Maguire would be a huge blow. Therefore, since Maguire is willing to accept a slight pay cut and stay at the club, Manchester United's decision to extend his stay at Old Trafford is entirely reasonable.
Maguire did not play in the match against Everton, but his importance has risen, while Casemiro seems to be going in the opposite direction. Although Manchester United often struggle without Casemiro this season, this match was an exception, with Casemiro underperforming and making no impact in 58 minutes.

Moreover, Casemiro received a yellow card, bringing his total to four. If he picks up another before round 19, he will face a one-match suspension. Unlike Maguire, the "Fat Tiger" struggles in these physical English-style matches. United conceded because of his failed challenge and Bruno Fernandes being out of position, allowing Hall to break through and shoot.
Casemiro showed good form at the start of the season but also suffers from poor stamina and excessive yellow cards. For Manchester United to progress, they need a midfielder who can consistently perform in this role every week—a younger midfielder.
Casemiro will turn 34 in February next year, and his physical abilities will only decline further. Additionally, he is the club's highest-paid player, earning £350,000 per week. Even supporters of his renewal agree that he must take a significant wage cut and accept a substitute role.
However, as a legendary player who won five Champions League titles with Real Madrid, Casemiro is reluctant to take a large pay cut to stay on the bench at Manchester United for £150,000 per week. He could instead earn money in the Saudi Professional League or return home to Brazil to play as a starter.
Therefore, although Amolin wants to keep Casemiro, for Sir Jim Ratcliffe and the Ineos management team, giving up the Brazilian international’s one-year contract extension option and letting him leave seems increasingly likely.

Ratcliffe’s goal is to implement a more reasonable wage structure, as demonstrated by the fact that the three attacking players signed this summer—Cunha, Mbemo, and Sheshko—each earn no more than £200,000 per week.