Manchester United manager Erik ten Hag believes 20-year-old forward Alejandro Garnacho has the 'X-factor' and potential to become a world-class player, though he emphasizes that Garnacho still has a long way to go. Garnacho has already made significant contributions, including scoring in the FA Cup and Community Shield matches and assisting in the Premier League opener against Fulham. Ten Hag highlights that achieving world-class status requires consistent hard work and development. Garnacho, along with teammates Kobbie Mainoo and Rasmus Højlund, has been identified as crucial to United's future and is not available for transfer. Ten Hag notes Garnacho’s ability to make a difference in critical moments but stresses the importance of consistency to reach the top level.