Russia is planning to complain to the International Olympic Committee (IOC) about several results from the gymnastics competitions in Athens.
The move follows an extraordinary men's horizontal bars final when crowd displeasure forced judges to upgrade the marks of Russian Alexei Nemov.
Russian spokesman Gennady Shvets said judges had been biased against Russia.
"The public's reaction to the judges' actions (on Nemov) clearly supports our position," said Shvets.
"There will be an official protest and our lawyers are
studying the grounds for giving it a legal character.
"This is in the interests of the Olympic movement and the
whole sporting community."
The Russians are intending to send a letter to IOC president outlining their concerns but after talks with lawyers, they are unlikely to make formal appeals to the International Gymnastics Federation (FIG) over individual scores.
The gymnastics events at the Athens Olympics have been hit by several judging controversies.
Most high profile was the marking mistake which cost South Korea's Yang Tae-young a gold in the men's all-round event.
And Russian Svetlana Khorkina,
was critical of judges after winning silver in the all-round individual event.
But Adrian Stoica, head of the FIG's men's technical committee, defended the judges.
"Just like gymnasts are human and can make mistakes, judges are also human and can make mistakes."
Stoica was the official who had to intervene in the judging process in Monday's horizontal bars final.
"Nemov had a spectacular routine. But as a judge, you must
see in the release at the beginning of the routine, there is a
slight bend of his knees, which is a deduction," he said.
"I didn't go over to the judges because the audience was
booing. Sometimes there is a difference between public
expectation and the judging process."