“We will now leave for Brazil on Monday after we could not fly out on Monday because our tickets were not ready,” a team official said.
“In the meantime, we have changed to a better hotel pending our departure.”
The Dream Team VI have been training in Atlanta for the past one month.
The African champions begin their campaign in Rio on Friday against Asian champions Japan.
Kick-off is 2am Nigerian time.
Sweden and Colombia are the other teams in their first round group.