Super Eagles have dropped three places in the latest FIFA Rankings after a loss to African champions Algeria and a draw with Tunisia in recent friendlies.
Nigeria are now 32nd in the rankings.
The Eagles have also dropped to fourth in Africa after Algeria toppled them to third place in the continental ratings.
Senegal remain the top ranked African team, while Tunisia are second.
Nigeria will be expected to improve their ratings next month when they battle fellow West Africans Sierra Leone in double-header AFCON qualifiers.
Belgium maintained the world No 1 spot.
