Manchester City boss Sven Goran Eriksson admits he needs to buy a new striker to replace crocked Valeri Bojinov.

"Work is going on in the office," he told the club's website.

"We didn't want to have to do it but we have to look carefully at the situation because when you have a player who needs this kind of operation and rehabilitation, you can never be sure how long it takes to come back.

"To lose one player for such a long time is a big blow.

"But it is not only a striker, we need one or two midfielders as well to be covered properly."