Man City boss Kevin Keegan revealed goalkeeper David Seaman could face two months out of action after getting injured in the defeat at Portsmouth.
Seaman went to hospital for an X-ray on his shoulder and collar bone and Keegan admitted it was a big loss.
"I don't think it's career-threatening but it's blow for us," said Keegan.
"It's David's shoulder or collar bone and he could be out for a minimum four
weeks or up to eight. He couldn't even lift his hand up.
"It looks like a fracture although we haven't had to assess him yet.
"It was a pretty innocuous challenge by Yakubu, I don't think he was guilty of anything."
Keegan saw his team soundly beaten as their woeful recent run was extended, despite strikes from Antoine Sibierski and Nicolas Anelka.
And to make matters worse, former player Eyal Berkovic - who signed for Portsmouth on Friday - lambasted the former England coach for letting him leave the club.
"Eyal should learn to keep his counsel," added Keegan.
"He's entitled to his opinion and he's bitter - but I've no axe to grind.
"I wished him good luck when he left and tried to make the move as easy as possible
as he wanted to go.
"His comments don't bother me one little bit.
"I have had worse said about me before and I don't think Eyal will be the only person in my career who says I should be sacked."