The G8 summit came as Russian-U.S. relations were strained over the United States' plans to place a missile defense system in Eastern Europe, its support of independence for Kosovo from Serbia and other issues.
"I can't imagine a situation where the Security Council will approve such a resolution," Lavrov said of Kosovo resolution at a news conference Wednesday. "Such a situation will not happen."
Lavrov had criticized the United States' support for Kosovo at the G8 leaders' private meeting, a European source told The New York Times.
"Lavrov said, 'Why don't we solve the case of Western Sahara first?'" the official told the Times. "He even brought up Abkhazia," a Black Sea region trying to secede from Georgia.
"And every time Lavrov said something, (U.S. Secretary of State Condoleezza Rice) would jump in," the official said. "It was like tennis."