The 20-year-old signed a new deal at Old Trafford in March, but his long-term future remains uncertain after failing to establish himself in Ole Gunnar Solskjaer’s plans.
Despite handing him a two-year extension, Solskjaer is looking for a steep improvement in the Dutchman before fully integrating him into United’s first team.
A loan move was always likely next season in a bid to get Chong regular football.
Bremen have emerged as leading contenders, with Chong said to be keen to follow in the footsteps of other young Premier League stars by making a move to Germany.
His agent Erkan Alkan told BILD: “Tahith would like to go to the Bundesliga. We’ll talk to Man United about it on Thursday. “
Werder have expressed their interest in a loan, with with sporting director Frank Baumann saying: “I know the player. We’re going to get an attacking wide player. I do not want to say more.”