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The 25-year-old is a key man for Derek McInnes' side and made his 20th appearance of the season in Rangers' weekend win at St Mirren.
However, he was a surprise omission in manager Eric Chelle's squad for their Africa Cup of Nations qualification double-header against Tanzania this month.
Fernandez is the latest Rangers star to be excluded from their international squads after Kim Min-su was left out of South Korea's team and Bojan Miovski was snubbed from the North Macedonia squad, even though their next game is in Glasgow against Scotland.
Fernandez won his fourth cap last month when he played for the Super Eagles in a friendly against Russia in Nizhny Novgorod, which finished in a 3-3 draw.
But he's failed to make the list for their upcoming games.
However, Fernandez may yet get a reprieve after Hull City stopper Semi Ajayi suffered an injury against Arsenal at the weekend, with reports in Nigeria suggesting Fernandez would be first in line to replace him if Ajayi doesn't make it.