Mason Mount made his unofficial debut for Manchester United when they faced Leeds United in a pre-season game.
The Red Devils faced Leeds in a friendly game on Wednesday and celebrated a 2-0 victory.
Mount played from the first minutes and was subbed before second half.
"Thanks for the support, Oslo!" he wrote following the game.
Meanwhile, Bruno Fernandes took to the comments section to send him a message as he wrote: "Looking sharp 😉."