The Black Cats are keen to make major additions to their squad before the transfer window slams shut and are looking to do business abroad.
Sunderland are in line to capture the services of attacker Dajaku, with the 20-year-old expected to move to the Stadium of Light.
Dajaku spent the second half of last term on loan at Union Berlin and will complete a permanent move back to the club.
The capital side will splash out in the region of €1m to secure the services of the Germany Under-20 forward.
Once the move is done and dusted, Dajaku will instantly be sent on loan to England with Sunderland.
Dajaku will sign a contract with Union Berlin which will run until the summer of 2024, while his loan at Sunderland will run until 2022.
The player has made three appearances for Bayern Munich at senior level, with the majority of his outings at the club coming for Bayern Munich II.