His compatriot has fired the Cottagers into automatic promotion contention after arriving from Newcastle on loan in January.
But Jokanovic has put talk of a permanent deal for the 24-year-old on the back-burner.
"He made a great job for us, club took the right decision to bring him to help us," Jokanovic Get West London .
"I don't know what will happen in the future, first of all he is a Newcastle player and ahead of him is the World Cup.
"I know he is really happy with the team, with the club, with the city and for another side he knows I am satisfied with level he offer us.
"Everything is open, part of another side if you ask me about if I want him with us, yes I want.
"If you as if they want to stay it's probably a yes, but in realistic life we are going to see.
"This job is for another side and not under my control."