NBA commissioner David Stern acknowledges the tremendous success the league is enjoying this season. He estimates that gross revenues will surpass $4 billion.

That said, Stern says that the game's financial structure must change.

"We are still likely to lose collectively somewhere in the neighborhood of $300 million, which is lower than $370 million of a few years ago and $340 [million] last year," Stern said. "But we still remain very much intent on having a system that actually allows us to both have a sustainable business model."

The NBA's collective bargaining agreement with its players expires June 30 at 11:59 p.m.