The Argentine has had his torn Achilles tendon operated on this week.
"It's very sad and I feel really bad for him," President Moratti stated on Tuesday morning about the man who was his first signing back in 1995. "He knows that.
"I spoke to him straight after the injury happened. But with his character he'll be back, there is no doubt about it.
"The fans can't think they won't see him again. They will and he will be back playing his best."