Super Eagles goalkeeper, Stanley Nwabali, was missing as the rest of the squad trained on Monday.
Nwabali had to be stretchered out during the 2023 Africa Cup of Nations last-16 clash against Cameroon.
The Chippa United keeper collided with Cameroon winger, Georges Nkoudou, during the encounter.
He was replaced by former number one stopper, Francis Uzoho, who kept a clean sheet as Nigeria won 2-0 against the Indomitable.
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Nwabali’s absence will come as a worry for fans, who have been impressed by his confident and calm displays at the tournament.
Speaking to reporters over the weekend, Nwabali said: “I don’t know [if I would be fit for the next game]. I will still come back.”