Wolfsburg pair Zvjezdan Misimovic and Marcel Schafer are interesting Atletico Madrid.
Atletico sports chief Jesus Garcia Pitarch is actively seeking to boost Quique Sanchez Flores' squad with the summer market opening.
German left-back Schafer and midfielder Misimovic are both in the sights of Atletico.
Benfica's experienced defender Luisao is also under consideration by Pitarch.