The Super Eagles on Monday evening commenced training for the two international friendlies in Belgium, with 15 players at the R. Battice FC training ground.
Chelsea midfielder Mikel Obi led goalkeeper Carl Ikeme, defenders Elderson Echiejile, Efe Ambrose, William Troost-Ekong and Leon Balogun, midfielders Sylvester Igbonu, Rabiu Ibrahim, Ogenyi Onazi and Obiora Nwankwo and forwards Odion Ighalo, Ahmed Musa, Moses Simon, Emmanuel Emenike and Alex Iwobi at training on Monday evening.
The Nigeria Football Federation official website reported that the team will train twice on Tuesday (10am and 4pm) at the same venue.
The team are still hopeful that the six home-based professionals yet to be issued visas in Abuja will depart Tuesday night.
The players are goalkeepers Femi Thomas and Ikechukwu Ezenwa, defender Chima Akas and Austin Oboroakpo, midfielder Paul Onobi and forward Prince Aggrey.
The Super Eagles take on the Leopards of Democratic Republic of Congo in Vise, Liege on Thursday before playing the Indomitable Lions of Cameroon in Dendermonde on Sunday.