City Hall, meanwhile, denied the report, which said Luzhkov could become a Federation Council senator after leaving the Mayor's Office.
Ivanov's appointment to a new position "is due early in the fall," Tvoi Den cited a source who works with Ivanov as saying.
The report cited sources in the government and the presidential administration as saying that Ivanov -- once seen as a likely successor to former President Vladimir Putin -- could be appointed to replace Luzhkov.
Luzhkov could step down after the City Day festivities, Tvoi Den cited an unidentified City Hall source as saying. A presidential administration source said Luzhkov could be appointed to the Federation Council, the report said.
City Hall spokesman Mikhail Solomentsev dismissed the report as "a canard and total rubbish," while an unidentified spokesperson for Ivanov refused to comment on "rumors," Interfax reported Wednesday.
Luzhkov, 71, was first elected mayor in 1992 and was reappointed last year after being nominated by Putin. Luzhkov's current four-year term ends in June 2011.
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