Very rated youngster Emeran confirmed on Instagram that he has joined the Red Devils from French Ligue 1 side Amiens.
His social media post showed the young winger holding a framed United shirt with 'Emeran' composed above the famous No 7 pullover - which is as of now being worn by Sanchez.
And United fans rushed to spot the number change on Twitter, with some recommending the youngster would do a superior job in the main XI than the former Arsenal forward.
Energizing prospect Emeran has joined United after previously being connected with any semblance of Paris Saint-Germain and Juventus.
On Instagram, he said: 'Happy and proud to announce my signature in this great club and enormous Family which is @manchesterunited.
'A major thank you to my parents, to Badou my lawyer, my loved ones and the coaches (from Sannois, Amiens and INF) who have made me grow up right up 'til today.
'This is the start of another and great adventure if God wants it.'While teammates Paul Pogba and Marcus Rashford among others have taken their games to another dimension under the Norwegian, Sanchez continues to disappoint.
The 30-year-old has only made three starts under Solskjaer amid damage issues and a lack of form. He may start the FA Cup fifth round tie at Chelsea on Monday if Anthony Martial and Jesse Lingard fail to recover from knocks yet Solskjaer demands he is powerless to improve him.
'When he plays he needs to get himself because we know there's a quality player there.'