New Chelsea boss Guus Hiddink now concedes his stay at the club is unlikely to be permanent. "What happens after May is rather clear, because it's rather difficult to do the two jobs," said the Dutchman.

"I have my obligations also in Russia," he added, noting that the demands of the Premier League mean that it would be impossible to combine the two jobs.

"It's rather difficult to do that because the Premier League is really challenging.

"We can do it now because we have just one or two games until June with the national team of Russia, that's why we said OK. We can do it now and we can do it full-hearted and fully committed."