Manchester United have completed the signing of 17-year-old midfielder Karim Cassim from Manchester City, adding another promising young talent to their academy ranks.
The England youth international has made the move across Manchester after leaving City, where he was part of the squad that lifted the FA Youth Cup last season.
Cassim’s decision to switch clubs represents another intriguing chapter in the long-running rivalry between the two Manchester giants, with United securing the services of a player who has already experienced success at youth level.
United confirmed the deal in an official statement, welcoming the teenager to Old Trafford.
“Manchester United have agreed the signing of exciting youngster Karim Cassim.
“The England youth international has joined after leaving Manchester City.
“Everyone at the club would like to welcome Karim to United and we wish him the very best of luck.”
The move comes as Manchester United continue to place significant attention on their pathway from the academy to the senior squad.
Cassim’s arrival also comes against the backdrop of uncertainty surrounding another highly rated United academy prospect, 15-year-old JJ Gabriel, who has reportedly expressed a desire to leave the club amid interest from several European sides.
United’s recruitment of Cassim therefore adds another layer to the club’s efforts to retain and attract emerging talent capable of developing into first-team players.
For Cassim, the move offers an opportunity to continue his development within a new environment after helping City achieve FA Youth Cup success last season.
The teenager will now look to settle into United’s academy structure and build on his experience with England’s youth teams.
United have also made a change to their first-team coaching structure, confirming the appointment of Connor King as assistant first-team goalkeeping coach.
King arrives from Burnley, where he worked in several coaching positions after joining the club’s setup in 2018.
His appointment provides another addition to manager Michael Carrick’s coaching team as United continue to shape their football operations.
While Cassim’s transfer is primarily an academy move, his decision to leave City for United is likely to attract attention because of the fierce rivalry between the two clubs.
The 17-year-old now has the chance to write his own story on the red side of Manchester, with his development expected to be closely followed as he progresses through the ranks.
For United, the priority will be giving Cassim the right environment to develop while continuing to build a pathway for the club’s most promising young players.
The arrival of an England youth international from their cross-city rivals underlines the competition for the next generation of football talent in Manchester.
If Cassim can continue his progress after his FA Youth Cup success with City, United will hope the move eventually becomes another example of their academy producing players capable of making the jump to senior football.

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