The Dutchman continues to rule out staying beyond the end of the season when he is due to return to his main job as Russia's national team coach.

He is currently combining both roles since agreeing to take over from sacked Luiz Felipe Scolari last month.

But Chelsea have reached the semi-finals of the FA Cup and the last eight of the Champions League in a seven-match unbeaten run under Hiddink's control.

Now some of the players who have rediscovered their best form under Hiddink are calling for him to make his stay permanent.

"I would love for him to say he is staying for three years," said midfielder Ballack.

"Everybody in the club and around the club can feel he is a great manager and even in a short time he has had a big influence on the team."

Ballack's sentiments were echoed by the club's Czech Republic international goalkeeper Petr Cech.

He is another player who has rediscovered his top form under the Dutchman's influence.

"He is a very good coach and we want him to stay," said Cech. "But it is a difficult political situation and we will have to wait to see what happens."

The political situation will ultimately be solved by the Russian Football Union. They allowed Hiddink to join Chelsea because of his close relationship with the club's billionaire owner Roman Abramovich.

Their friendship could be tested to the limit in the summer if the pressure grows on Hiddink to remain with Chelsea on a full-time basis.

Russian Football Union president, Vitaly Mutko, admitted things could change in the summer but says it would be better for Hiddink to remain in charge of a national side.

"At the moment, we have an agreement with Guus Hiddink that he will combine the two posts only until the summer," said Mutko.

"Of course, everything can change, but we should take into account that, for Hiddink, it is better to work with a national side. He is not only a coach but also an organiser, a politician - not a club man.

"I don't think he would agree to join any club other than Chelsea, and that is not because of his special relationship with Roman Abramovich but because Chelsea is the kind of global side that any coach would like to manage."

Meanwhile Ballack has indicated he is keen to remain at Stamford Bridge.

The midfielder has a one-year extension option on his contract.

His current deal expires next summer but Ballack declared: "I expect to be back next season and maybe a few more years as well.

"I've always said I can imagine finishing my career at Chelsea and, right now, I think I will remain here."