CHELSEA have signed Russian international midfielder Yuri Zhirkov for $30m from CSKA Moscow according to Russian newspaper Tvoi Den.The tabloid claims Zhirkov will join on a four-year contract.

CHELSEA have signed Russian international midfielder Yuri Zhirkov for $30m from CSKA Moscow according to Russian newspaper Tvoi Den.

The tabloid claims Zhirkov will join on a four-year contract.

“Yuri has signed the contract with Chelsea just a day or two ago,” the newspaper quoted Zhirkov's agent as saying. “He will join his new team this summer.”