Dinamo Moscow striker Alexander Kerzhakov has questioned Yuri Zhirkov's move to Chelsea.

"I think Yuri will find it more difficult than Arshavin. Andrey went to Arsenal as a star player," said Kerzhakov.

"Zhirkov goes to an environment where everyone is a star. He will have to fight to win a place in the team.

"Two-and-a-half years ago you would say Florent Malouda could not compete with him, but now the Frenchman has improved."