Eintracht Frankfurt's Filip Kostic is reluctant to sign for West Ham United.
According to The Guardian, the Hammers are able to find an agreement with Eintracht for his signature.
However, the issue is convincing the player to come to a club only in the Europa Conference League.
With one year left on his contract, Kostic may be willing to wait until next year to secure his dream move to a Champions League team.
The Serbia international can play in the premier competition with Eintracht this season, and then secure a move away if he gets substantial offers as a free agent next summer.
Kostic can play as a left winger and left-wing-back.