Leonardo Gryler, chief executive of the Rio 2016 Olympic and Paralympic Games Organising Committee, said that the biggest challenges facing the city are providing enough hotel rooms for visitors and creating a sufficient transport infrastructure.
"It might seem controversial, but one of the ways we are looking into to reduce the chances of empty seats is to have fewer seats in our venues," he added.
Eduardo Paes, mayor of City of Rio de Janeiro, added that he had identified hotel capacity as a potential problem. "The World Cup in 2014 will help us get an idea of the demand. We are looking to double our hotel room numbers by 2016 [to 27,800 rooms] and will provide boats and ships to house visitors as well as villas."
Elsewhere, problems with Rio De Janeiro Internacional Airport's ability to support the 2016 Games were acknowledged by Gryler, who said a plan was being put into place.
Paes went on to congratulate London mayor Boris Johnson for his efforts putting on a "fantastic" London Games, adding that Rio had 150 people in London assessing how to learn from the city's "creative and innovative" strategies.