However, Grant is happy to have the services of a very goood third choice keeper in Henrique Hilario, who came on for Cudicini on Tuesday night.
"The news is that is doesn't look so good for the moment with Carlo but we need to wait and see. It is his hamstring," the Chelsea boss revealed.
"This year I am more a doctor than a manager, I need to answer every week about injuries.
"It is very important for a third goalkeeper when you need him and we have needed him this year to do a good job.
"It's not easy when you lose your goalkeeper.
"We have Hilario and have the goalkeeper from the youth team. He is a good goalkeeper."