Nigeria and South Africa are among the African nations to have lost ground in the June FIFA World Rankings, released on Thursday.
The Super Eagles, the lowest ranked of Africa's five World Cup-bound teams, have dropped one place to 48th overall in the world. They're now seventh among CAF's teams after being overtaken by rivals Ghana.
The Black Stars appear to be on an upward curve under Kwese Appiah, and climbed three spots to 47th overall and sixth in Africa.
Tunisia, who soared up to 14th in the World Rankings in May, were among the continent's big fallers as they dropped seven places and will end the month in 21st overall.
They remain Africa's highest-ranked team, ahead of the other World Cup bound sides Senegal (27th), Morocco (41st), Egypt (45th) and Nigeria.
The Democratic Republic of Congo remain the best ranked side not heading to Russia, and they stay unmoved in 38th.
Elsewhere, South Africa, Algeria and Cape Verde - who drop seven places - are among the other losers inside Africa's top 15, while continental champions Cameroon move up one spot to 49.
Guinea-Bissau were Africa's biggest fallers as they tumbled 17 spots to 121st, while Madagascar were the biggest climbers as they moved up eight places to 106th overall.