Andre Villas-Boas says Petr Cech remains an integral part of Chelsea's plans, with informal talks having been opened regarding a contract extension.
The Blues keeper still has 18 months left to run on his current deal, but the club are determined to tie him down long term.
Villas-Boas is hoping the 29-year-old can be persuaded to pen fresh terms, allowing him to complete at least a decade of service at Stamford Bridge.
The Portuguese tactician has played down any suggestion that the Czech shot-stopper could be allowed to leave, with experience between the sticks vital to any ambitious outfit.
"There are false stories about Petr Cech leaving the club," said Villas-Boas.
"We are trying to reach an agreement with Petr.
"He knows that we are trying to reach an agreement with him and that we are interested in renewing his contract."
He added: "The goalkeeper position is very, very specific."
Rumours that Cech could be allowed to leave have been sparked by the impressive progress being made by Thibaut Courtois.
The 19-year-old, who joined Chelsea from Genk over the summer, is currently taking in a loan spell at Atletico Madrid.
He is regarded as the natural successor to Cech at Stamford Bridge, but Villas-Boas insist he has no plans to bring the youngster into his first team plans any time soon.
He said: Regarding Courtois, we have to make a decision.
"We won't recall him in January, for sure.
"At the end of the season, we have to decide."