Sao Paulo officials say the city may not participate in the Olympic football tournament because of the high costs involved in the competition. Sports Secretary Celso Jatene told the Folha de S. Paulo newspaper the city is ''not guaranteed'' as a host. Sao Paulo was pre-selected by local organizers as one of the six football cities for the 2016 Games, along with Rio, Belo Horizonte, Brasilia, Salvador and Manaus. More...