Jose Mourinho signed this summer Eric Bailly, Zlatan Ibrahimovic and Henrikh Mkhitaryan. He's also keen to sign Paul Pogba, but they're still struggeling about the conditions and didn't agree yet on a deal.
Several players have been linked with an exit and we sum up the list for you.
Who should leave and who should stay?
Adnan Januzaj
He failed on loan at Borussia Dortmund last season and returned in January to Old Trafford. He played just 17 minutes for the rest of the season and is likely to leave. The new Sunderland manager contacted Mourinho for a possible loan move.
Bastian Schweinsteiger
The German struggled lately a lot due to injuries. After recovering he didn't reach his form. The 31-year-old has been linked with a move to Paris Saint-Germain and the Turkish clubs Fenerbahce and Besiktas.
Will Keane
The 23-year-old joined the club last season, but struggled ever since. Since Mourinho bought a lot of top-stars he won't get a place in the first-team.
Marouane Fellaini
The Belgian joined Man Utd last season but could leave after just one year. According to rumours, Roma want to sign him for £15m.
Ander Herrera
The Spaniard failed at the China tour. He isn't indispensable for the team and the midfield is congested. Other European clubs like Atletico Madrid and Juventus are interested in him.
Daley Blind
Blind disappointed during the pres-season in China. He is a multifunctional player, but Mourinho doesn't need player like him.
Phil Jones
He couldn't get a permanent spot and played during the last season as a midfielder, a center-back and as a right-back.
Matteo Darmian
The 26-year-old joined Man United last season from Torino. Napoli are keen to sign the the defender, which could become true since Higuain left the team.
Marcos Rojo
The Argentinian has been playing since two years at Old Trafford, but he hasn't convinced.
Memphis Depay
The 22-year-old has been playing since last season for the Premier League club but didn't convince.
Juan Mata
Mourinho sold the Spaniard already when he was his coach at Chelsea, so he might repeat. Very strong players like Rooney, Mkhitaryan, Martial and Rashford are playing in the attacking midfield and he's not able to keep pace with the competition.He could go to Juventus as a part of the Pogba deal.