The former Manchester United and Norwich City defender joined the Tigers in August,
Jakirovic told BBC Radio Humberside: “He felt yesterday his calf a little bit so he will go on MRI.
“We are waiting (for) news and also we made one plan for him, six weeks plan, that he has a rhythm of games.
“He played for the Under-21s and then together with the club now we will decide what we will do with him in January.
“(Whether) he will stay with us (or) he will fight for his place, so he will continue forward maybe, to change clubs, but we will see.
“This is also a question for all clubs. Right now, in those (academy) games he showed something but I don’t know if it’s enough for the Championship.
“This is something what maybe I need to decide we will do with him.
“Whether he will stay or he will change.”