The Super Eagles of Nigeria are now ranked 35th in the world, according to the latest FIFA rankings.
It represents a gradual decline for the African champions, who sat in number 31 position last month.
Nigeria defeated Kenya 1-0 and drew 1-1 with Namibia in their two World Cup qualifiers played last month, before heading to the Confederations Cup in Brazil. At the tournament, they thrashed Tahiti 6-1, lost 1-2 to Uruguay and were beaten 3-0 by Spain.
Cote d’Ivoire is still the top ranked African team at number 13, while Spain retains their number 1 spot in the world. Brazil, who won the Confederations Cup on home soil climbed up 13 spots to finish in 9th place.