The Watford defender limped off with an injury on Friday and he has left Austria for further medical examinations
Gernot Rohr has handed a late call-up to Ujpest defender Vincent Onovo as the replacement for injured William Troost-Ekong ahead of Nigeria’s second friendly match against Cameroon on Tuesday.
Troost-Ekong picked up an injury towards the end of Friday’s game and he was replaced by Galatasaray defender Valentine Ozornwafor.
The Watford star has reportedly left Vienna for further medical examinations, while Collins remains a doubt and he awaits a late fitness test.
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A first-half strike from Fulham midfielder Andre-Frank Zambo Anguissa settled the clash at the Wiener Neustadt Stadium as the Indomitable Lions defeated Rohr’s men 1-0.