Wikki Tourists forward, Umar Aminu, will miss the Flying Eagles warm-up game against hosts Egypt on Wednesday afternoon on account of an ankle injury.
The forward suffered the injury during Saturday's friendly against Benin Republic in Abuja, which ended in a goalless draw.
Aminu, who could play as a right winger or a second striker, has been one of the shining stars for the Nigeria youth team.
The Flying Eagles trained on Tuesday afternoon at the Cairo International Stadium practice pitch preparatory to the friendly, which will be played at the Degla Stadium also in Cairo.
The Nigeria U20s' trained for an hour from 3 p.m. local time just before their Egyptian counterparts also worked out at the adjoining training pitch.
The match will be played on Wednesday by 3 p.m. local time, which is 2 p.m. Nigerian time, on an artificial pitch.
The second match between the two teams will also be staged on an artificial pitch at the Salam Stadium in Cairo on Friday.
This is a good preparation for both teams as matches at the 2013 African Youth Championship, AYC, will be played on artificial pitches.
The Flying Eagles will depart Cairo on Saturday for Tunisia, where they will train before they fly directly to Algeria in time for the AYC.