PARIS, France (CNN) - French President Nicolas Sarkozy said Wednesday he is not satisfied with parts of the draft conclusions for the G-20 summit and may even leave if the results are "less than concrete."
"I will not associate with a summit that is useless," Sarkozy told Europe 1 radio Wednesday morning, a day before he meets other world leaders in London.
If the summit reaches only "false compromises" and nothing concrete, he might leave the summit, Sarkozy said - but he added that it's a step he's reluctant to take, and that he doesn't expect the summit to reach that stage.
"An empty chair would be proof of failure" at the summit, Sarkozy said.
Dozens of world leaders and financial chiefs from the Group of 20 nations are holding a summit Thursday in London. The global monetary crisis is expected to be the central issue.
Sarkozy said "sherpas," or representatives of the various world leaders, have been hammering out the summit's final communique for days. Some ideas are on the table, he said, but there are some items that France and Germany disagree with.
"It doesn't add up," Sarkozy said of the draft communique.
Still, three chapters are certain to be in the final document, Sarkozy said: regulation of the markets, more stimulus packages to put "fuel into the system," and making sure the poorest countries don't have to pay the most to resolve the financial crisis.