Brazil heads the list, with Argentina, world champions Germany, Copa America holders Chile and Colombia completing the top five.
Bafana are 12th in Africa, with Egypt, Senegal, AFCON holders Cameroon, Burkina Faso and Nigeria setting the pace on the continent.
With many club seasons nearing their climax, it was a quiet month on the international front.
Seeing just seven games played, the top 20 places remained static following April, with a one-place drop for Slovakia (24) into accounting for the only movement inside the leading 73 nations. Bolivia (73, plus 1) brought about that small ripple of motion.
World top 10: Brazil, Argentina, Germany, Chile, Colombia, France, Belgium, Portugal, Switzerland, Spain.
Africa top 10: Egypt, Senegal, Cameroon, Burkina Faso, Nigeria, Congo DR, Tunisia, Ghana, Ivory Coast, Morocco.