Super Eagles winger Samuel Kalu is yet to return to training with the rest of the team as he is still under observation after he collapsed on the eve of Nigeria’s opening game against Burundi.

On Friday, the winger slumped during practice and was first feared to have suffered a heart attack.

However, after Saturday’s win over Burundi, Gernot Rohr still exempted the player from a full team practice session.

Kalu practised on his own but under supervision of the Eagles coaches and doctors.

Meanwhile, Shehu Abdullahi will miss Nigeria’s Group B clash against the Syli Nationale of Guinea on Wednesday at the Alexandria Stadium due to a hamstring injury.

Abdullahi picked up the injury in the Super Eagles’ 1-0 win against the Swallows of Burundi last Saturday.

The Bursaspor of Turkey defender was replaced by Chidozie Awaziem three minutes before the break against the Burundians after he sustained the injury.

Gernot Rohr’s men top Group B with three points after the first round of games, and a win against Guinea who forced Madagascar to a 2-2 in their first game will see them book a place in the Round of 16.

The Nigeria versus Guinea on Wednesday will kick-off at 3.30 pm Nigerian time.