The Gunners captain has been out since December after suffering a medial knee ligament injury in a challenge with Liverpool's Xabi Alonso at the Emirates Stadium, and had pencilled in Arsenal's home clash with Manchester City on April 4 as a possible return date.
However, the Spaniard has since declared himself ready to take part in the club's crucial European ties with Roma, although he is not expected to be handed his comeback against the Italians with Wenger refusing to risk further injury to his star man.
"He says he could play, but I have to tell him it's not possible," he said. "But the doctor tells him first.
"Cesc is itching to get back. But after the second leg he will not be far if it all goes well.
"Two or three weeks' normal training. He can play now but a medial ligament takes six to eight weeks and if there is any contact then you can see what can happen."
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