Manchester City boss Sven Goran Eriksson admits a new goalkeeper signing this week is "a must".
Eriksson told the Manchester Evening News: "Joe Hart should be back training on Tuesday or Wednesday, a maximum of a week but Isaksson is worse. He has a hairline fracture and could be away for a month.
"It's not the best way to start the Premier League, starting with two very young goalkeepers. It's more or less a must that we bring another keeper in."