MANCHESTER UNITED ace Kobbie Mainoo has undergone a massive body transformation despite falling down the pecking order at Old Trafford.
, 20, has barely featured for United at the start of the season and was not selected by England boss Thomas Tuchel for the World Cup qualifiers against Andorra and Serbia.





And the midfielder is taking advantage of the international break to improve his fitness and force his way into Man Utd manager ‘s plans this season.
The Red Devils’ academy graduate was snapped doing some sprint training as he practiced with personal coach Jonas Dodoo for over an hour on Friday in Cheshire.
And it looks like all the hard work is paying off as he appears to have bulked up.
That is especially the case when it comes to the England international’s legs as his quads have really grown.
United fans appear impressed with Mainoo’s hard work during the break as he recently sent them wild with a that showed him juggling the ball with absolute class and grace.
The central midfielder appears completely focused on the Manchester giants following a in the late stages of the summer transfer window.
Mainoo had hoped to seal a move to in a switch that would have reunited him with Scott McTominay and Rasmus Hojlund.
The promising youngster, who has already earned ten caps for England, is desperate to impress ahead of the 2026 World Cup.
The ace believed a move to Naples would have improved his chances of boosting his game time in order to impress Tuchel.
The deal did not go through as United in Amorim’s squad.
Mainoo will now have to fight for his spot at Old Trafford if he is to earn a spot on the plane to the US, Mexico and Canada.
He was an unused substitute in the loss to Arsenal and the draw at Fulham.
Mainoo has so far only played 45 minutes in the Premier League, which all came in the 3-2 win over Burnley at Old Trafford.
Nevertheless, he did play the full 90 minutes against Grimsby in the Carabao Cup, but that match ended in an on penalties.
Kobbie Mainoo on Instagram 💫 pic.twitter.com/UBD27hjWAZ
— UtdDistrict (@UtdDistrict) September 3, 2025