Maria Sharapova will be the Russian delegation's flag-bearer at next month's Olympic opening ceremony in London, Russia's tennis chief Shamil Tarpishchev said on Tuesday.
But Sports Minister Vitaly Mutko said the Russian Olympic Committee (ROC) would make the final decision on the flag-bearer next month.
The Russians would break with tradition if they chose Sharapova, who won the French Open title last weekend.
Carrying the flag is considered a great honour in Russia and it is traditionally given to famous athletes, mostly men, such as Greco-Roman wrestler Alexander Karelin and swimmer Alexander Popov, who have won numerous Olympic titles.
"Tennis is a very popular sport and, so as far as I know, Roger Federer has been chosen to carry the Swiss flag and Rafa Nadal will lead the Spanish delegation at the opening ceremony in London," Tarpishchev, a member of the International Olympic Committee, was quoted as saying by local media.
But Mutko told reporters: "Maria is an outstanding athlete, a worthy candidate, but she is only one of several candidates for that role.
"The final decision will be taken by the (ROC) executive board at its meeting on July 10-11."
Sharapova, 25, will be making her Olympic debut in London after failing to qualify for the 2004 Games in Athens and missing the 2008 edition in Beijing with a shoulder injury.
"The Olympics has been a dream of mine since I was a young girl," Sharapova, who was born in Siberia but is now based in Florida, said earlier this year.
"Growing up in Russia, tennis wasn't a big sport back then. It was all about being an Olympian."
The Olympic tennis tournament will be played on the grass courts at Wimbledon where, as a 17-year-old, Sharapova stunned Serena Williams in the 2004 Wimbledon final to win her maiden grand slam title.
Her win in Paris gave Sharapova the full set of four grand slam titles.
(Reporting by Gennady Fyodorov; Editing by Robert Woodward)