Kalu, who is yet to return to training with the rest of the team, was reported in some quarters to be on his way back to his club with Leicester City’s Iheanacho as his replacement.
But the official, who pleaded anonymity, told The Guardian that the coaches have not discussed Kalu’s substitution.
He said that Kalu, who collapsed on Friday during a training session, was still under observation, adding that he would soon rejoin his mates in training.
“We have capable hands looking after him and I think they are the once that would decide when he is ready to play.
“He has been practicing on his own and doing all the right things, but they are still watching him.
“I can tell you that he is eager to start playing, but the game against Guinea is too early for him.”
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