"We have to be careful that the medium and long-term revenues are only assured if the Games are a success. We have to control the size of complexity and cost of the Games," he said.

"The programme is one of the major drivers of the cost."

The IOC has set a maximum of 28 sports for the Olympics, but with baseball and softball being dropped for the 2012 Games, the London Olympics will have 26 sports.

The minimum number of sports is currently set at 15, a point the NOCs proposed to change to 25.

Rogge said this would be discussed in coming board meetings with a decision most likely in 2007.