Anzhi Makhachkala boss Guus Hiddink says he plans to retire from coaching at the end of the season.
The 66-year-old told De Telegraaf of his intention, and added that he would not go back on his decision even if Anzhi were to qualify for next season's Champions League.
"It was not my intention to stay any longer when I joined this club," the Anzhi manager said. "I'm basically going to stop at the end of the season.
"I'm 66 years old, you could say that I've had enough."
The news comes as a blow not just to the ambitious Russian Premier League club, but also arguably to Chelsea owner Roman Abramovich, who has long admired Hiddink and may have considered him a candidate for the manager's job at Stamford Bridge in the long term.
Hiddink took temporary charge of Chelsea for the final four months of the 2008-09 season after the sacking of Luis Felipe Scolari, helping the club to the FA Cup and losing just once in all competitions.
Since then the Dutchman has been continually linked with a return to Stamford Bridge on a permanent basis, including after last week's sacking of Roberto di Matteo.
But Hiddink told De Telegraaf he wants to get out of management to avoid getting stuck in a rut.
"I get up every day with so much energy," he said. "But you have to be careful not to get into a routine.
"You have to be careful that people think: 'here he is again.'
"So Anzhi is basically the last team which I will coach."
Hiddink's Anzhi are currently third in the Russian Premier League, and are already through to the knock-out stages of the Europa League with a game to spare.