Nigeria coach Gernot Rohr will not add any new goalkeepers to his squad for the 2018 World Cup qualifying double-header against Cameroon.
Johnson, 29, has won 56 caps for the U.S. since making his debut under former coach Jurgen Klinsmann in November 2011.
Portugal came third in the Confederations Cup but the future looks bright. Bernardo and Andre Silva look great, but the team needs to replace Pepe.
Fourteen potential World Cup qualifiers have expressed to FIFA their desire to be based in Sochi during Russia 2018, sources have told ESPN FC.
Grozny, the capital city of Chechnya, has been shortlisted by FIFA as a potential team base camp for the 2018 World Cup finals in Russia.