Bosso has until January 25 to submit his 21-man list to the Nigeria Football Federation, NFF, who will then forward it to the Confederation of African Football, CAF.
The local and foreign players in camp have been fighting hard to secure a place in the squad.
Majority of the players, DAILY POST, learnt have impressed the Bosso-led technical crew, who are now having sleepless nights on coming out with a final list.
The Flying Eagles will face Zambia in a double-header friendly at the Moshood Abiola Stadium, Abuja on January 27 and January 30 respectively.
The seven-time African champions will travel to Morocco for a training tour at the end of this month.
The Flying Eagles will face hosts Egypt, Mozambique and Senegal in Group A at the 2023 U-20 AFCON.