14 players, including captain Ahmed Musa, have reported to the national team camp at the Ibom Meridien Hotel and Resorts while the remaining players are expected on Tuesday morning.
The available players trained at the team's hotel on Monday evening before the general group session at Godswill Akpabio Stadium on Tuesday evening.
Nigeria will be hoping to start their qualification campaign on a flying note against the Squirrels on Wednesday, before travelling to Maseru where they battle Lesotho in their second Group L game.
The players already in camp:
Goalkeepers: Ikechukwu Ezenwa, Daniel Akpeyi and Maduka Okoye.
Defenders: Kenneth Omeruo, Chidozie Awaziem, Ola Aina, Jamilu Collins and Semi Ajayi.
Midfielders: Alex Iwobi, Ramon Azeez and Wilfred Ndidi.
Forwards: Ahmed Musa, Samuel Kalu and Victor Osimhen.
William Ekong, Ifeanyi Anaemena, Abdullahi Shehu, Mikel Agu, Joe Aribo, Moses Simon, Samuel Chukwueze, Paul Onuachu and Emmanuel Dennis.