Guus Hiddink has ruled out any prospect of combining both the Russia and Chelsea jobs next season.
The Dutchman is currently combining both roles and continues to insist he will leave Chelsea after the FA Cup final at Wembley on May 30.
He said: "Even on a practical level, it's impossible to do. In August we have a friendly game which is 48 hours before a Chelsea game."
Hiddink has now dismissed any chance of combining the roles next season as he attempts to guide Russia into the 2010 World Cup finals in South Africa.
Hiddink has a clause in his contract with the Russian Football Federation that allows him to leave the job should they fail to reach the finals.
But even if the Barclays Premier League club reached a further agreement with the Russian Federation to allow Hiddink to continue in both roles until their World Cup fate was known, the Dutchman would turn it down.
"It's important this relationship I have with the Russia players," said Hiddink.
"I know the body of the squad - so scouting isn't the main issue, but I've challenged them and it wouldn't be fair for me to leave.
"There is this project I started to renew with my people. It would not be fair with the players who I challenged to go into a new era of football if I said: 'Sorry, I'm leaving'."
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